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 </pre><pre class="rust"><code><span class="doccomment">//! The [`Date`] struct and its associated `impl`s.

 </span><span class="kw">use </span>core::fmt;
 <span class="kw">use </span>core::ops::{Add, Sub};
 <span class="kw">use </span>core::time::Duration <span class="kw">as </span>StdDuration;
 <span class="attribute">#[cfg(feature = <span class="string">&quot;formatting&quot;</span>)]
 </span><span class="kw">use </span>std::io;

 <span class="kw">use </span><span class="kw">crate</span>::convert::<span class="kw-2">*</span>;
 <span class="attribute">#[cfg(feature = <span class="string">&quot;formatting&quot;</span>)]
 </span><span class="kw">use </span><span class="kw">crate</span>::formatting::Formattable;
 <span class="attribute">#[cfg(feature = <span class="string">&quot;parsing&quot;</span>)]
 </span><span class="kw">use </span><span class="kw">crate</span>::parsing::Parsable;
 <span class="kw">use </span><span class="kw">crate</span>::util::{days_in_year, days_in_year_month, is_leap_year, weeks_in_year};
 <span class="kw">use crate</span>::{error, Duration, Month, PrimitiveDateTime, Time, Weekday};

 <span class="doccomment">/// The minimum valid year.
 </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const </span>MIN_YEAR: i32 = <span class="kw">if </span><span class="macro">cfg!</span>(feature = <span class="string">&quot;large-dates&quot;</span>) {
     -<span class="number">999_999
 </span>} <span class="kw">else </span>{
     -<span class="number">9999
 </span>};
 <span class="doccomment">/// The maximum valid year.
 </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const </span>MAX_YEAR: i32 = <span class="kw">if </span><span class="macro">cfg!</span>(feature = <span class="string">&quot;large-dates&quot;</span>) {
     <span class="number">999_999
 </span>} <span class="kw">else </span>{
     <span class="number">9999
 </span>};

 <span class="doccomment">/// Date in the proleptic Gregorian calendar.
 ///
 /// By default, years between ±9999 inclusive are representable. This can be expanded to ±999,999
 /// inclusive by enabling the `large-dates` crate feature. Doing so has performance implications
 /// and introduces some ambiguities when parsing.
 </span><span class="attribute">#[derive(Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
 </span><span class="kw">pub struct </span>Date {
     <span class="doccomment">/// Bitpacked field containing both the year and ordinal.
     </span><span class="comment">// |     xx     | xxxxxxxxxxxxxxxxxxxxx | xxxxxxxxx |
     // |   2 bits   |        21 bits        |  9 bits   |
     // | unassigned |         year          |  ordinal  |
     // The year is 15 bits when `large-dates` is not enabled.
     </span>value: i32,
 }

 <span class="kw">impl </span>Date {
     <span class="doccomment">/// The minimum valid `Date`.
     ///
     /// The value of this may vary depending on the feature flags enabled.
     </span><span class="kw">pub const </span>MIN: <span class="self">Self </span>= <span class="self">Self</span>::__from_ordinal_date_unchecked(MIN_YEAR, <span class="number">1</span>);

     <span class="doccomment">/// The maximum valid `Date`.
     ///
     /// The value of this may vary depending on the feature flags enabled.
     </span><span class="kw">pub const </span>MAX: <span class="self">Self </span>= <span class="self">Self</span>::__from_ordinal_date_unchecked(MAX_YEAR, days_in_year(MAX_YEAR));

     <span class="comment">// region: constructors
     </span><span class="doccomment">/// Construct a `Date` from the year and ordinal values, the validity of which must be
     /// guaranteed by the caller.
     </span><span class="attribute">#[doc(hidden)]
     </span><span class="kw">pub const fn </span>__from_ordinal_date_unchecked(year: i32, ordinal: u16) -&gt; <span class="self">Self </span>{
         <span class="macro">debug_assert!</span>(year &gt;= MIN_YEAR);
         <span class="macro">debug_assert!</span>(year &lt;= MAX_YEAR);
         <span class="macro">debug_assert!</span>(ordinal != <span class="number">0</span>);
         <span class="macro">debug_assert!</span>(ordinal &lt;= days_in_year(year));

         <span class="self">Self </span>{
             value: (year &lt;&lt; <span class="number">9</span>) | ordinal <span class="kw">as </span>i32,
         }
     }

     <span class="doccomment">/// Attempt to create a `Date` from the year, month, and day.
     ///
     /// ```rust
     /// # use time::{Date, Month};
     /// assert!(Date::from_calendar_date(2019, Month::January, 1).is_ok());
     /// assert!(Date::from_calendar_date(2019, Month::December, 31).is_ok());
     /// ```
     ///
     /// ```rust
     /// # use time::{Date, Month};
     /// assert!(Date::from_calendar_date(2019, Month::February, 29).is_err()); // 2019 isn&#39;t a leap year.
     /// ```
     </span><span class="kw">pub const fn </span>from_calendar_date(
         year: i32,
         month: Month,
         day: u8,
     ) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, error::ComponentRange&gt; {
         <span class="doccomment">/// Cumulative days through the beginning of a month in both common and leap years.
         </span><span class="kw">const </span>DAYS_CUMULATIVE_COMMON_LEAP: [[u16; <span class="number">12</span>]; <span class="number">2</span>] = [
             [<span class="number">0</span>, <span class="number">31</span>, <span class="number">59</span>, <span class="number">90</span>, <span class="number">120</span>, <span class="number">151</span>, <span class="number">181</span>, <span class="number">212</span>, <span class="number">243</span>, <span class="number">273</span>, <span class="number">304</span>, <span class="number">334</span>],
             [<span class="number">0</span>, <span class="number">31</span>, <span class="number">60</span>, <span class="number">91</span>, <span class="number">121</span>, <span class="number">152</span>, <span class="number">182</span>, <span class="number">213</span>, <span class="number">244</span>, <span class="number">274</span>, <span class="number">305</span>, <span class="number">335</span>],
         ];

         <span class="macro">ensure_value_in_range!</span>(year <span class="kw">in </span>MIN_YEAR =&gt; MAX_YEAR);
         <span class="macro">ensure_value_in_range!</span>(day conditionally <span class="kw">in </span><span class="number">1 </span>=&gt; days_in_year_month(year, month));

         <span class="prelude-val">Ok</span>(<span class="self">Self</span>::__from_ordinal_date_unchecked(
             year,
             DAYS_CUMULATIVE_COMMON_LEAP[is_leap_year(year) <span class="kw">as </span>usize][month <span class="kw">as </span>usize - <span class="number">1</span>]
                 + day <span class="kw">as </span>u16,
         ))
     }

     <span class="doccomment">/// Attempt to create a `Date` from the year and ordinal day number.
     ///
     /// ```rust
     /// # use time::Date;
     /// assert!(Date::from_ordinal_date(2019, 1).is_ok());
     /// assert!(Date::from_ordinal_date(2019, 365).is_ok());
     /// ```
     ///
     /// ```rust
     /// # use time::Date;
     /// assert!(Date::from_ordinal_date(2019, 366).is_err()); // 2019 isn&#39;t a leap year.
     /// ```
     </span><span class="kw">pub const fn </span>from_ordinal_date(year: i32, ordinal: u16) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, error::ComponentRange&gt; {
         <span class="macro">ensure_value_in_range!</span>(year <span class="kw">in </span>MIN_YEAR =&gt; MAX_YEAR);
         <span class="macro">ensure_value_in_range!</span>(ordinal conditionally <span class="kw">in </span><span class="number">1 </span>=&gt; days_in_year(year));
         <span class="prelude-val">Ok</span>(<span class="self">Self</span>::__from_ordinal_date_unchecked(year, ordinal))
     }

     <span class="doccomment">/// Attempt to create a `Date` from the ISO year, week, and weekday.
     ///
     /// ```rust
     /// # use time::{Date, Weekday::*};
     /// assert!(Date::from_iso_week_date(2019, 1, Monday).is_ok());
     /// assert!(Date::from_iso_week_date(2019, 1, Tuesday).is_ok());
     /// assert!(Date::from_iso_week_date(2020, 53, Friday).is_ok());
     /// ```
     ///
     /// ```rust
     /// # use time::{Date, Weekday::*};
     /// assert!(Date::from_iso_week_date(2019, 53, Monday).is_err()); // 2019 doesn&#39;t have 53 weeks.
     /// ```
     </span><span class="kw">pub const fn </span>from_iso_week_date(
         year: i32,
         week: u8,
         weekday: Weekday,
     ) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, error::ComponentRange&gt; {
         <span class="macro">ensure_value_in_range!</span>(year <span class="kw">in </span>MIN_YEAR =&gt; MAX_YEAR);
         <span class="macro">ensure_value_in_range!</span>(week conditionally <span class="kw">in </span><span class="number">1 </span>=&gt; weeks_in_year(year));

         <span class="kw">let </span>adj_year = year - <span class="number">1</span>;
         <span class="kw">let </span>raw = <span class="number">365 </span>* adj_year + <span class="macro">div_floor!</span>(adj_year, <span class="number">4</span>) - <span class="macro">div_floor!</span>(adj_year, <span class="number">100</span>)
             + <span class="macro">div_floor!</span>(adj_year, <span class="number">400</span>);
         <span class="kw">let </span>jan_4 = <span class="kw">match </span>(raw % <span class="number">7</span>) <span class="kw">as </span>i8 {
             -<span class="number">6 </span>| <span class="number">1 </span>=&gt; <span class="number">8</span>,
             -<span class="number">5 </span>| <span class="number">2 </span>=&gt; <span class="number">9</span>,
             -<span class="number">4 </span>| <span class="number">3 </span>=&gt; <span class="number">10</span>,
             -<span class="number">3 </span>| <span class="number">4 </span>=&gt; <span class="number">4</span>,
             -<span class="number">2 </span>| <span class="number">5 </span>=&gt; <span class="number">5</span>,
             -<span class="number">1 </span>| <span class="number">6 </span>=&gt; <span class="number">6</span>,
             <span class="kw">_ </span>=&gt; <span class="number">7</span>,
         };
         <span class="kw">let </span>ordinal = week <span class="kw">as </span>i16 * <span class="number">7 </span>+ weekday.number_from_monday() <span class="kw">as </span>i16 - jan_4;

         <span class="prelude-val">Ok</span>(<span class="kw">if </span>ordinal &lt;= <span class="number">0 </span>{
             <span class="self">Self</span>::__from_ordinal_date_unchecked(
                 year - <span class="number">1</span>,
                 (ordinal <span class="kw">as </span>u16).wrapping_add(days_in_year(year - <span class="number">1</span>)),
             )
         } <span class="kw">else if </span>ordinal &gt; days_in_year(year) <span class="kw">as </span>i16 {
             <span class="self">Self</span>::__from_ordinal_date_unchecked(year + <span class="number">1</span>, ordinal <span class="kw">as </span>u16 - days_in_year(year))
         } <span class="kw">else </span>{
             <span class="self">Self</span>::__from_ordinal_date_unchecked(year, ordinal <span class="kw">as _</span>)
         })
     }

     <span class="doccomment">/// Create a `Date` from the Julian day.
     ///
     /// The algorithm to perform this conversion is derived from one provided by Peter Baum; it is
     /// freely available [here](https://www.researchgate.net/publication/316558298_Date_Algorithms).
     ///
     /// ```rust
     /// # use time::Date;
     /// # use time_macros::date;
     /// assert_eq!(Date::from_julian_day(0), Ok(date!(-4713 - 11 - 24)));
     /// assert_eq!(Date::from_julian_day(2_451_545), Ok(date!(2000 - 01 - 01)));
     /// assert_eq!(Date::from_julian_day(2_458_485), Ok(date!(2019 - 01 - 01)));
     /// assert_eq!(Date::from_julian_day(2_458_849), Ok(date!(2019 - 12 - 31)));
     /// ```
     </span><span class="attribute">#[doc(alias = <span class="string">&quot;from_julian_date&quot;</span>)]
     </span><span class="kw">pub const fn </span>from_julian_day(julian_day: i32) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, error::ComponentRange&gt; {
         <span class="macro">ensure_value_in_range!</span>(
             julian_day <span class="kw">in </span><span class="self">Self</span>::MIN.to_julian_day() =&gt; <span class="self">Self</span>::MAX.to_julian_day()
         );
         <span class="prelude-val">Ok</span>(<span class="self">Self</span>::from_julian_day_unchecked(julian_day))
     }

     <span class="doccomment">/// Create a `Date` from the Julian day.
     ///
     /// This does not check the validity of the provided Julian day, and as such may result in an
     /// internally invalid value.
     </span><span class="attribute">#[doc(alias = <span class="string">&quot;from_julian_date_unchecked&quot;</span>)]
     </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const fn </span>from_julian_day_unchecked(julian_day: i32) -&gt; <span class="self">Self </span>{
         <span class="macro">debug_assert!</span>(julian_day &gt;= <span class="self">Self</span>::MIN.to_julian_day());
         <span class="macro">debug_assert!</span>(julian_day &lt;= <span class="self">Self</span>::MAX.to_julian_day());

         <span class="comment">// To avoid a potential overflow, the value may need to be widened for some arithmetic.

         </span><span class="kw">let </span>z = julian_day - <span class="number">1_721_119</span>;
         <span class="kw">let </span>(<span class="kw-2">mut </span>year, <span class="kw-2">mut </span>ordinal) = <span class="kw">if </span>julian_day &lt; -<span class="number">19_752_948 </span>|| julian_day &gt; <span class="number">23_195_514 </span>{
             <span class="kw">let </span>g = <span class="number">100 </span>* z <span class="kw">as </span>i64 - <span class="number">25</span>;
             <span class="kw">let </span>a = (g / <span class="number">3_652_425</span>) <span class="kw">as </span>i32;
             <span class="kw">let </span>b = a - a / <span class="number">4</span>;
             <span class="kw">let </span>year = <span class="macro">div_floor!</span>(<span class="number">100 </span>* b <span class="kw">as </span>i64 + g, <span class="number">36525</span>) <span class="kw">as </span>i32;
             <span class="kw">let </span>ordinal = (b + z - <span class="macro">div_floor!</span>(<span class="number">36525 </span>* year <span class="kw">as </span>i64, <span class="number">100</span>) <span class="kw">as </span>i32) <span class="kw">as _</span>;
             (year, ordinal)
         } <span class="kw">else </span>{
             <span class="kw">let </span>g = <span class="number">100 </span>* z - <span class="number">25</span>;
             <span class="kw">let </span>a = g / <span class="number">3_652_425</span>;
             <span class="kw">let </span>b = a - a / <span class="number">4</span>;
             <span class="kw">let </span>year = <span class="macro">div_floor!</span>(<span class="number">100 </span>* b + g, <span class="number">36525</span>);
             <span class="kw">let </span>ordinal = (b + z - <span class="macro">div_floor!</span>(<span class="number">36525 </span>* year, <span class="number">100</span>)) <span class="kw">as _</span>;
             (year, ordinal)
         };

         <span class="kw">if </span>is_leap_year(year) {
             ordinal += <span class="number">60</span>;
             <span class="macro">cascade!</span>(ordinal <span class="kw">in </span><span class="number">1</span>..<span class="number">367 </span>=&gt; year);
         } <span class="kw">else </span>{
             ordinal += <span class="number">59</span>;
             <span class="macro">cascade!</span>(ordinal <span class="kw">in </span><span class="number">1</span>..<span class="number">366 </span>=&gt; year);
         }

         <span class="self">Self</span>::__from_ordinal_date_unchecked(year, ordinal)
     }
     <span class="comment">// endregion constructors

     // region: getters
     </span><span class="doccomment">/// Get the year of the date.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).year(), 2019);
     /// assert_eq!(date!(2019 - 12 - 31).year(), 2019);
     /// assert_eq!(date!(2020 - 01 - 01).year(), 2020);
     /// ```
     </span><span class="kw">pub const fn </span>year(<span class="self">self</span>) -&gt; i32 {
         <span class="self">self</span>.value &gt;&gt; <span class="number">9
     </span>}

     <span class="doccomment">/// Get the month.
     ///
     /// ```rust
     /// # use time::Month;
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).month(), Month::January);
     /// assert_eq!(date!(2019 - 12 - 31).month(), Month::December);
     /// ```
     </span><span class="kw">pub const fn </span>month(<span class="self">self</span>) -&gt; Month {
         <span class="self">self</span>.month_day().<span class="number">0
     </span>}

     <span class="doccomment">/// Get the day of the month.
     ///
     /// The returned value will always be in the range `1..=31`.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).day(), 1);
     /// assert_eq!(date!(2019 - 12 - 31).day(), 31);
     /// ```
     </span><span class="kw">pub const fn </span>day(<span class="self">self</span>) -&gt; u8 {
         <span class="self">self</span>.month_day().<span class="number">1
     </span>}

     <span class="doccomment">/// Get the month and day. This is more efficient than fetching the components individually.
     </span><span class="comment">// For whatever reason, rustc has difficulty optimizing this function. It&#39;s significantly faster
     // to write the statements out by hand.
     </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const fn </span>month_day(<span class="self">self</span>) -&gt; (Month, u8) {
         <span class="doccomment">/// The number of days up to and including the given month. Common years
         /// are first, followed by leap years.
         </span><span class="kw">const </span>CUMULATIVE_DAYS_IN_MONTH_COMMON_LEAP: [[u16; <span class="number">11</span>]; <span class="number">2</span>] = [
             [<span class="number">31</span>, <span class="number">59</span>, <span class="number">90</span>, <span class="number">120</span>, <span class="number">151</span>, <span class="number">181</span>, <span class="number">212</span>, <span class="number">243</span>, <span class="number">273</span>, <span class="number">304</span>, <span class="number">334</span>],
             [<span class="number">31</span>, <span class="number">60</span>, <span class="number">91</span>, <span class="number">121</span>, <span class="number">152</span>, <span class="number">182</span>, <span class="number">213</span>, <span class="number">244</span>, <span class="number">274</span>, <span class="number">305</span>, <span class="number">335</span>],
         ];

         <span class="kw">let </span>days = CUMULATIVE_DAYS_IN_MONTH_COMMON_LEAP[is_leap_year(<span class="self">self</span>.year()) <span class="kw">as </span>usize];
         <span class="kw">let </span>ordinal = <span class="self">self</span>.ordinal();

         <span class="kw">if </span>ordinal &gt; days[<span class="number">10</span>] {
             (Month::December, (ordinal - days[<span class="number">10</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">9</span>] {
             (Month::November, (ordinal - days[<span class="number">9</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">8</span>] {
             (Month::October, (ordinal - days[<span class="number">8</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">7</span>] {
             (Month::September, (ordinal - days[<span class="number">7</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">6</span>] {
             (Month::August, (ordinal - days[<span class="number">6</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">5</span>] {
             (Month::July, (ordinal - days[<span class="number">5</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">4</span>] {
             (Month::June, (ordinal - days[<span class="number">4</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">3</span>] {
             (Month::May, (ordinal - days[<span class="number">3</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">2</span>] {
             (Month::April, (ordinal - days[<span class="number">2</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">1</span>] {
             (Month::March, (ordinal - days[<span class="number">1</span>]) <span class="kw">as _</span>)
         } <span class="kw">else if </span>ordinal &gt; days[<span class="number">0</span>] {
             (Month::February, (ordinal - days[<span class="number">0</span>]) <span class="kw">as _</span>)
         } <span class="kw">else </span>{
             (Month::January, ordinal <span class="kw">as _</span>)
         }
     }

     <span class="doccomment">/// Get the day of the year.
     ///
     /// The returned value will always be in the range `1..=366` (`1..=365` for common years).
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).ordinal(), 1);
     /// assert_eq!(date!(2019 - 12 - 31).ordinal(), 365);
     /// ```
     </span><span class="kw">pub const fn </span>ordinal(<span class="self">self</span>) -&gt; u16 {
         (<span class="self">self</span>.value &amp; <span class="number">0x1FF</span>) <span class="kw">as _
     </span>}

     <span class="doccomment">/// Get the ISO 8601 year and week number.
     </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const fn </span>iso_year_week(<span class="self">self</span>) -&gt; (i32, u8) {
         <span class="kw">let </span>(year, ordinal) = <span class="self">self</span>.to_ordinal_date();

         <span class="kw">match </span>((ordinal + <span class="number">10 </span>- <span class="self">self</span>.weekday().number_from_monday() <span class="kw">as </span>u16) / <span class="number">7</span>) <span class="kw">as _ </span>{
             <span class="number">0 </span>=&gt; (year - <span class="number">1</span>, weeks_in_year(year - <span class="number">1</span>)),
             <span class="number">53 </span><span class="kw">if </span>weeks_in_year(year) == <span class="number">52 </span>=&gt; (year + <span class="number">1</span>, <span class="number">1</span>),
             week =&gt; (year, week),
         }
     }

     <span class="doccomment">/// Get the ISO week number.
     ///
     /// The returned value will always be in the range `1..=53`.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).iso_week(), 1);
     /// assert_eq!(date!(2019 - 10 - 04).iso_week(), 40);
     /// assert_eq!(date!(2020 - 01 - 01).iso_week(), 1);
     /// assert_eq!(date!(2020 - 12 - 31).iso_week(), 53);
     /// assert_eq!(date!(2021 - 01 - 01).iso_week(), 53);
     /// ```
     </span><span class="kw">pub const fn </span>iso_week(<span class="self">self</span>) -&gt; u8 {
         <span class="self">self</span>.iso_year_week().<span class="number">1
     </span>}

     <span class="doccomment">/// Get the week number where week 1 begins on the first Sunday.
     ///
     /// The returned value will always be in the range `0..=53`.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).sunday_based_week(), 0);
     /// assert_eq!(date!(2020 - 01 - 01).sunday_based_week(), 0);
     /// assert_eq!(date!(2020 - 12 - 31).sunday_based_week(), 52);
     /// assert_eq!(date!(2021 - 01 - 01).sunday_based_week(), 0);
     /// ```
     </span><span class="kw">pub const fn </span>sunday_based_week(<span class="self">self</span>) -&gt; u8 {
         ((<span class="self">self</span>.ordinal() <span class="kw">as </span>i16 - <span class="self">self</span>.weekday().number_days_from_sunday() <span class="kw">as </span>i16 + <span class="number">6</span>) / <span class="number">7</span>) <span class="kw">as _
     </span>}

     <span class="doccomment">/// Get the week number where week 1 begins on the first Monday.
     ///
     /// The returned value will always be in the range `0..=53`.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).monday_based_week(), 0);
     /// assert_eq!(date!(2020 - 01 - 01).monday_based_week(), 0);
     /// assert_eq!(date!(2020 - 12 - 31).monday_based_week(), 52);
     /// assert_eq!(date!(2021 - 01 - 01).monday_based_week(), 0);
     /// ```
     </span><span class="kw">pub const fn </span>monday_based_week(<span class="self">self</span>) -&gt; u8 {
         ((<span class="self">self</span>.ordinal() <span class="kw">as </span>i16 - <span class="self">self</span>.weekday().number_days_from_monday() <span class="kw">as </span>i16 + <span class="number">6</span>) / <span class="number">7</span>) <span class="kw">as _
     </span>}

     <span class="doccomment">/// Get the year, month, and day.
     ///
     /// ```rust
     /// # use time::Month;
     /// # use time_macros::date;
     /// assert_eq!(
     ///     date!(2019 - 01 - 01).to_calendar_date(),
     ///     (2019, Month::January, 1)
     /// );
     /// ```
     </span><span class="kw">pub const fn </span>to_calendar_date(<span class="self">self</span>) -&gt; (i32, Month, u8) {
         <span class="kw">let </span>(month, day) = <span class="self">self</span>.month_day();
         (<span class="self">self</span>.year(), month, day)
     }

     <span class="doccomment">/// Get the year and ordinal day number.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).to_ordinal_date(), (2019, 1));
     /// ```
     </span><span class="kw">pub const fn </span>to_ordinal_date(<span class="self">self</span>) -&gt; (i32, u16) {
         (<span class="self">self</span>.year(), <span class="self">self</span>.ordinal())
     }

     <span class="doccomment">/// Get the ISO 8601 year, week number, and weekday.
     ///
     /// ```rust
     /// # use time::Weekday::*;
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).to_iso_week_date(), (2019, 1, Tuesday));
     /// assert_eq!(date!(2019 - 10 - 04).to_iso_week_date(), (2019, 40, Friday));
     /// assert_eq!(
     ///     date!(2020 - 01 - 01).to_iso_week_date(),
     ///     (2020, 1, Wednesday)
     /// );
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).to_iso_week_date(),
     ///     (2020, 53, Thursday)
     /// );
     /// assert_eq!(date!(2021 - 01 - 01).to_iso_week_date(), (2020, 53, Friday));
     /// ```
     </span><span class="kw">pub const fn </span>to_iso_week_date(<span class="self">self</span>) -&gt; (i32, u8, Weekday) {
         <span class="kw">let </span>(year, ordinal) = <span class="self">self</span>.to_ordinal_date();
         <span class="kw">let </span>weekday = <span class="self">self</span>.weekday();

         <span class="kw">match </span>((ordinal + <span class="number">10 </span>- <span class="self">self</span>.weekday().number_from_monday() <span class="kw">as </span>u16) / <span class="number">7</span>) <span class="kw">as _ </span>{
             <span class="number">0 </span>=&gt; (year - <span class="number">1</span>, weeks_in_year(year - <span class="number">1</span>), weekday),
             <span class="number">53 </span><span class="kw">if </span>weeks_in_year(year) == <span class="number">52 </span>=&gt; (year + <span class="number">1</span>, <span class="number">1</span>, weekday),
             week =&gt; (year, week, weekday),
         }
     }

     <span class="doccomment">/// Get the weekday.
     ///
     /// ```rust
     /// # use time::Weekday::*;
     /// # use time_macros::date;
     /// assert_eq!(date!(2019 - 01 - 01).weekday(), Tuesday);
     /// assert_eq!(date!(2019 - 02 - 01).weekday(), Friday);
     /// assert_eq!(date!(2019 - 03 - 01).weekday(), Friday);
     /// assert_eq!(date!(2019 - 04 - 01).weekday(), Monday);
     /// assert_eq!(date!(2019 - 05 - 01).weekday(), Wednesday);
     /// assert_eq!(date!(2019 - 06 - 01).weekday(), Saturday);
     /// assert_eq!(date!(2019 - 07 - 01).weekday(), Monday);
     /// assert_eq!(date!(2019 - 08 - 01).weekday(), Thursday);
     /// assert_eq!(date!(2019 - 09 - 01).weekday(), Sunday);
     /// assert_eq!(date!(2019 - 10 - 01).weekday(), Tuesday);
     /// assert_eq!(date!(2019 - 11 - 01).weekday(), Friday);
     /// assert_eq!(date!(2019 - 12 - 01).weekday(), Sunday);
     /// ```
     </span><span class="kw">pub const fn </span>weekday(<span class="self">self</span>) -&gt; Weekday {
         <span class="kw">match </span><span class="self">self</span>.to_julian_day() % <span class="number">7 </span>{
             -<span class="number">6 </span>| <span class="number">1 </span>=&gt; Weekday::Tuesday,
             -<span class="number">5 </span>| <span class="number">2 </span>=&gt; Weekday::Wednesday,
             -<span class="number">4 </span>| <span class="number">3 </span>=&gt; Weekday::Thursday,
             -<span class="number">3 </span>| <span class="number">4 </span>=&gt; Weekday::Friday,
             -<span class="number">2 </span>| <span class="number">5 </span>=&gt; Weekday::Saturday,
             -<span class="number">1 </span>| <span class="number">6 </span>=&gt; Weekday::Sunday,
             val =&gt; {
                 <span class="macro">debug_assert!</span>(val == <span class="number">0</span>);
                 Weekday::Monday
             }
         }
     }

     <span class="doccomment">/// Get the next calendar date.
     ///
     /// ```rust
     /// # use time::Date;
     /// # use time_macros::date;
     /// assert_eq!(
     ///     date!(2019 - 01 - 01).next_day(),
     ///     Some(date!(2019 - 01 - 02))
     /// );
     /// assert_eq!(
     ///     date!(2019 - 01 - 31).next_day(),
     ///     Some(date!(2019 - 02 - 01))
     /// );
     /// assert_eq!(
     ///     date!(2019 - 12 - 31).next_day(),
     ///     Some(date!(2020 - 01 - 01))
     /// );
     /// assert_eq!(Date::MAX.next_day(), None);
     /// ```
     </span><span class="kw">pub const fn </span>next_day(<span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="self">Self</span>&gt; {
         <span class="kw">if </span><span class="self">self</span>.ordinal() == <span class="number">366 </span>|| (<span class="self">self</span>.ordinal() == <span class="number">365 </span>&amp;&amp; !is_leap_year(<span class="self">self</span>.year())) {
             <span class="kw">if </span><span class="self">self</span>.value == <span class="self">Self</span>::MAX.value {
                 <span class="prelude-val">None
             </span>} <span class="kw">else </span>{
                 <span class="prelude-val">Some</span>(<span class="self">Self</span>::__from_ordinal_date_unchecked(<span class="self">self</span>.year() + <span class="number">1</span>, <span class="number">1</span>))
             }
         } <span class="kw">else </span>{
             <span class="prelude-val">Some</span>(<span class="self">Self </span>{
                 value: <span class="self">self</span>.value + <span class="number">1</span>,
             })
         }
     }

     <span class="doccomment">/// Get the previous calendar date.
     ///
     /// ```rust
     /// # use time::Date;
     /// # use time_macros::date;
     /// assert_eq!(
     ///     date!(2019 - 01 - 02).previous_day(),
     ///     Some(date!(2019 - 01 - 01))
     /// );
     /// assert_eq!(
     ///     date!(2019 - 02 - 01).previous_day(),
     ///     Some(date!(2019 - 01 - 31))
     /// );
     /// assert_eq!(
     ///     date!(2020 - 01 - 01).previous_day(),
     ///     Some(date!(2019 - 12 - 31))
     /// );
     /// assert_eq!(Date::MIN.previous_day(), None);
     /// ```
     </span><span class="kw">pub const fn </span>previous_day(<span class="self">self</span>) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="self">Self</span>&gt; {
         <span class="kw">if </span><span class="self">self</span>.ordinal() != <span class="number">1 </span>{
             <span class="prelude-val">Some</span>(<span class="self">Self </span>{
                 value: <span class="self">self</span>.value - <span class="number">1</span>,
             })
         } <span class="kw">else if </span><span class="self">self</span>.value == <span class="self">Self</span>::MIN.value {
             <span class="prelude-val">None
         </span>} <span class="kw">else </span>{
             <span class="prelude-val">Some</span>(<span class="self">Self</span>::__from_ordinal_date_unchecked(
                 <span class="self">self</span>.year() - <span class="number">1</span>,
                 days_in_year(<span class="self">self</span>.year() - <span class="number">1</span>),
             ))
         }
     }

     <span class="doccomment">/// Get the Julian day for the date.
     ///
     /// The algorithm to perform this conversion is derived from one provided by Peter Baum; it is
     /// freely available [here](https://www.researchgate.net/publication/316558298_Date_Algorithms).
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(date!(-4713 - 11 - 24).to_julian_day(), 0);
     /// assert_eq!(date!(2000 - 01 - 01).to_julian_day(), 2_451_545);
     /// assert_eq!(date!(2019 - 01 - 01).to_julian_day(), 2_458_485);
     /// assert_eq!(date!(2019 - 12 - 31).to_julian_day(), 2_458_849);
     /// ```
     </span><span class="kw">pub const fn </span>to_julian_day(<span class="self">self</span>) -&gt; i32 {
         <span class="kw">let </span>year = <span class="self">self</span>.year() - <span class="number">1</span>;
         <span class="kw">let </span>ordinal = <span class="self">self</span>.ordinal() <span class="kw">as </span>i32;

         ordinal + <span class="number">365 </span>* year + <span class="macro">div_floor!</span>(year, <span class="number">4</span>) - <span class="macro">div_floor!</span>(year, <span class="number">100</span>)
             + <span class="macro">div_floor!</span>(year, <span class="number">400</span>)
             + <span class="number">1_721_425
     </span>}
     <span class="comment">// endregion getters

     // region: checked arithmetic
     </span><span class="doccomment">/// Computes `self + duration`, returning `None` if an overflow occurred.
     ///
     /// ```rust
     /// # use time::{Date, ext::NumericalDuration};
     /// # use time_macros::date;
     /// assert_eq!(Date::MAX.checked_add(1.days()), None);
     /// assert_eq!(Date::MIN.checked_add((-2).days()), None);
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).checked_add(2.days()),
     ///     Some(date!(2021 - 01 - 02))
     /// );
     /// ```
     ///
     /// # Note
     ///
     /// This function only takes whole days into account.
     ///
     /// ```rust
     /// # use time::{Date, ext::NumericalDuration};
     /// # use time_macros::date;
     /// assert_eq!(Date::MAX.checked_add(23.hours()), Some(Date::MAX));
     /// assert_eq!(Date::MIN.checked_add((-23).hours()), Some(Date::MIN));
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).checked_add(23.hours()),
     ///     Some(date!(2020 - 12 - 31))
     /// );
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).checked_add(47.hours()),
     ///     Some(date!(2021 - 01 - 01))
     /// );
     /// ```
     </span><span class="kw">pub const fn </span>checked_add(<span class="self">self</span>, duration: Duration) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="self">Self</span>&gt; {
         <span class="kw">let </span>whole_days = duration.whole_days();
         <span class="kw">if </span>whole_days &lt; i32::MIN <span class="kw">as </span>i64 || whole_days &gt; i32::MAX <span class="kw">as </span>i64 {
             <span class="kw">return </span><span class="prelude-val">None</span>;
         }

         <span class="kw">let </span>julian_day = <span class="macro">const_try_opt!</span>(<span class="self">self</span>.to_julian_day().checked_add(whole_days <span class="kw">as _</span>));
         <span class="kw">if let </span><span class="prelude-val">Ok</span>(date) = <span class="self">Self</span>::from_julian_day(julian_day) {
             <span class="prelude-val">Some</span>(date)
         } <span class="kw">else </span>{
             <span class="prelude-val">None
         </span>}
     }

     <span class="doccomment">/// Computes `self - duration`, returning `None` if an overflow occurred.
     ///
     /// ```
     /// # use time::{Date, ext::NumericalDuration};
     /// # use time_macros::date;
     /// assert_eq!(Date::MAX.checked_sub((-2).days()), None);
     /// assert_eq!(Date::MIN.checked_sub(1.days()), None);
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).checked_sub(2.days()),
     ///     Some(date!(2020 - 12 - 29))
     /// );
     /// ```
     ///
     /// # Note
     ///
     /// This function only takes whole days into account.
     ///
     /// ```
     /// # use time::{Date, ext::NumericalDuration};
     /// # use time_macros::date;
     /// assert_eq!(Date::MAX.checked_sub((-23).hours()), Some(Date::MAX));
     /// assert_eq!(Date::MIN.checked_sub(23.hours()), Some(Date::MIN));
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).checked_sub(23.hours()),
     ///     Some(date!(2020 - 12 - 31))
     /// );
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).checked_sub(47.hours()),
     ///     Some(date!(2020 - 12 - 30))
     /// );
     /// ```
     </span><span class="kw">pub const fn </span>checked_sub(<span class="self">self</span>, duration: Duration) -&gt; <span class="prelude-ty">Option</span>&lt;<span class="self">Self</span>&gt; {
         <span class="kw">let </span>whole_days = duration.whole_days();
         <span class="kw">if </span>whole_days &lt; i32::MIN <span class="kw">as </span>i64 || whole_days &gt; i32::MAX <span class="kw">as </span>i64 {
             <span class="kw">return </span><span class="prelude-val">None</span>;
         }

         <span class="kw">let </span>julian_day = <span class="macro">const_try_opt!</span>(<span class="self">self</span>.to_julian_day().checked_sub(whole_days <span class="kw">as _</span>));
         <span class="kw">if let </span><span class="prelude-val">Ok</span>(date) = <span class="self">Self</span>::from_julian_day(julian_day) {
             <span class="prelude-val">Some</span>(date)
         } <span class="kw">else </span>{
             <span class="prelude-val">None
         </span>}
     }
     <span class="comment">// endregion: checked arithmetic

     // region: saturating arithmetic
     </span><span class="doccomment">/// Computes `self + duration`, saturating value on overflow.
     ///
     /// ```rust
     /// # use time::{Date, ext::NumericalDuration};
     /// # use time_macros::date;
     /// assert_eq!(Date::MAX.saturating_add(1.days()), Date::MAX);
     /// assert_eq!(Date::MIN.saturating_add((-2).days()), Date::MIN);
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).saturating_add(2.days()),
     ///     date!(2021 - 01 - 02)
     /// );
     /// ```
     ///
     /// # Note
     ///
     /// This function only takes whole days into account.
     ///
     /// ```rust
     /// # use time::ext::NumericalDuration;
     /// # use time_macros::date;
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).saturating_add(23.hours()),
     ///     date!(2020 - 12 - 31)
     /// );
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).saturating_add(47.hours()),
     ///     date!(2021 - 01 - 01)
     /// );
     /// ```
     </span><span class="kw">pub const fn </span>saturating_add(<span class="self">self</span>, duration: Duration) -&gt; <span class="self">Self </span>{
         <span class="kw">if let </span><span class="prelude-val">Some</span>(datetime) = <span class="self">self</span>.checked_add(duration) {
             datetime
         } <span class="kw">else if </span>duration.is_negative() {
             <span class="self">Self</span>::MIN
         } <span class="kw">else </span>{
             <span class="macro">debug_assert!</span>(duration.is_positive());
             <span class="self">Self</span>::MAX
         }
     }

     <span class="doccomment">/// Computes `self - duration`, saturating value on overflow.
     ///
     /// ```
     /// # use time::{Date, ext::NumericalDuration};
     /// # use time_macros::date;
     /// assert_eq!(Date::MAX.saturating_sub((-2).days()), Date::MAX);
     /// assert_eq!(Date::MIN.saturating_sub(1.days()), Date::MIN);
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).saturating_sub(2.days()),
     ///     date!(2020 - 12 - 29)
     /// );
     /// ```
     ///
     /// # Note
     ///
     /// This function only takes whole days into account.
     ///
     /// ```
     /// # use time::ext::NumericalDuration;
     /// # use time_macros::date;
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).saturating_sub(23.hours()),
     ///     date!(2020 - 12 - 31)
     /// );
     /// assert_eq!(
     ///     date!(2020 - 12 - 31).saturating_sub(47.hours()),
     ///     date!(2020 - 12 - 30)
     /// );
     /// ```
     </span><span class="kw">pub const fn </span>saturating_sub(<span class="self">self</span>, duration: Duration) -&gt; <span class="self">Self </span>{
         <span class="kw">if let </span><span class="prelude-val">Some</span>(datetime) = <span class="self">self</span>.checked_sub(duration) {
             datetime
         } <span class="kw">else if </span>duration.is_negative() {
             <span class="self">Self</span>::MAX
         } <span class="kw">else </span>{
             <span class="macro">debug_assert!</span>(duration.is_positive());
             <span class="self">Self</span>::MIN
         }
     }
     <span class="comment">// region: saturating arithmetic

     // region: replacement
     </span><span class="doccomment">/// Replace the year. The month and day will be unchanged.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(
     ///     date!(2022 - 02 - 18).replace_year(2019),
     ///     Ok(date!(2019 - 02 - 18))
     /// );
     /// assert!(date!(2022 - 02 - 18).replace_year(-1_000_000_000).is_err()); // -1_000_000_000 isn&#39;t a valid year
     /// assert!(date!(2022 - 02 - 18).replace_year(1_000_000_000).is_err()); // 1_000_000_000 isn&#39;t a valid year
     /// ```
     </span><span class="attribute">#[must_use = <span class="string">&quot;This method does not mutate the original `Date`.&quot;</span>]
     </span><span class="kw">pub const fn </span>replace_year(<span class="self">self</span>, year: i32) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, error::ComponentRange&gt; {
         <span class="macro">ensure_value_in_range!</span>(year <span class="kw">in </span>MIN_YEAR =&gt; MAX_YEAR);

         <span class="kw">let </span>ordinal = <span class="self">self</span>.ordinal();

         <span class="comment">// Dates in January and February are unaffected by leap years.
         </span><span class="kw">if </span>ordinal &lt;= <span class="number">59 </span>{
             <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="self">Self</span>::__from_ordinal_date_unchecked(year, ordinal));
         }

         <span class="kw">match </span>(is_leap_year(<span class="self">self</span>.year()), is_leap_year(year)) {
             (<span class="bool-val">false</span>, <span class="bool-val">false</span>) | (<span class="bool-val">true</span>, <span class="bool-val">true</span>) =&gt; <span class="prelude-val">Ok</span>(<span class="self">Self</span>::__from_ordinal_date_unchecked(year, ordinal)),
             <span class="comment">// February 29 does not exist in common years.
             </span>(<span class="bool-val">true</span>, <span class="bool-val">false</span>) <span class="kw">if </span>ordinal == <span class="number">60 </span>=&gt; <span class="prelude-val">Err</span>(error::ComponentRange {
                 name: <span class="string">&quot;day&quot;</span>,
                 value: <span class="number">29</span>,
                 minimum: <span class="number">1</span>,
                 maximum: <span class="number">28</span>,
                 conditional_range: <span class="bool-val">true</span>,
             }),
             <span class="comment">// We&#39;re going from a common year to a leap year. Shift dates in March and later by
             // one day.
             </span>(<span class="bool-val">false</span>, <span class="bool-val">true</span>) =&gt; <span class="prelude-val">Ok</span>(<span class="self">Self</span>::__from_ordinal_date_unchecked(year, ordinal + <span class="number">1</span>)),
             <span class="comment">// We&#39;re going from a leap year to a common year. Shift dates in January and
             // February by one day.
             </span>(<span class="bool-val">true</span>, <span class="bool-val">false</span>) =&gt; <span class="prelude-val">Ok</span>(<span class="self">Self</span>::__from_ordinal_date_unchecked(year, ordinal - <span class="number">1</span>)),
         }
     }

     <span class="doccomment">/// Replace the month of the year.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// # use time::Month;
     /// assert_eq!(
     ///     date!(2022 - 02 - 18).replace_month(Month::January),
     ///     Ok(date!(2022 - 01 - 18))
     /// );
     /// assert!(
     ///     date!(2022 - 01 - 30)
     ///         .replace_month(Month::February)
     ///         .is_err()
     /// ); // 30 isn&#39;t a valid day in February
     /// ```
     </span><span class="attribute">#[must_use = <span class="string">&quot;This method does not mutate the original `Date`.&quot;</span>]
     </span><span class="kw">pub const fn </span>replace_month(<span class="self">self</span>, month: Month) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, error::ComponentRange&gt; {
         <span class="kw">let </span>(year, <span class="kw">_</span>, day) = <span class="self">self</span>.to_calendar_date();
         <span class="self">Self</span>::from_calendar_date(year, month, day)
     }

     <span class="doccomment">/// Replace the day of the month.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert_eq!(
     ///     date!(2022 - 02 - 18).replace_day(1),
     ///     Ok(date!(2022 - 02 - 01))
     /// );
     /// assert!(date!(2022 - 02 - 18).replace_day(0).is_err()); // 0 isn&#39;t a valid day
     /// assert!(date!(2022 - 02 - 18).replace_day(30).is_err()); // 30 isn&#39;t a valid day in February
     /// ```
     </span><span class="attribute">#[must_use = <span class="string">&quot;This method does not mutate the original `Date`.&quot;</span>]
     </span><span class="kw">pub const fn </span>replace_day(<span class="self">self</span>, day: u8) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, error::ComponentRange&gt; {
         <span class="comment">// Days 1-28 are present in every month, so we can skip checking.
         </span><span class="kw">if </span>day == <span class="number">0 </span>|| day &gt;= <span class="number">29 </span>{
             <span class="macro">ensure_value_in_range!</span>(
                 day conditionally <span class="kw">in </span><span class="number">1 </span>=&gt; days_in_year_month(<span class="self">self</span>.year(), <span class="self">self</span>.month())
             );
         }

         <span class="prelude-val">Ok</span>(<span class="self">Self</span>::__from_ordinal_date_unchecked(
             <span class="self">self</span>.year(),
             (<span class="self">self</span>.ordinal() <span class="kw">as </span>i16 - <span class="self">self</span>.day() <span class="kw">as </span>i16 + day <span class="kw">as </span>i16) <span class="kw">as _</span>,
         ))
     }
     <span class="comment">// endregion replacement
 </span>}

 <span class="comment">// region: attach time
 </span><span class="doccomment">/// Methods to add a [`Time`] component, resulting in a [`PrimitiveDateTime`].
 </span><span class="kw">impl </span>Date {
     <span class="doccomment">/// Create a [`PrimitiveDateTime`] using the existing date. The [`Time`] component will be set
     /// to midnight.
     ///
     /// ```rust
     /// # use time_macros::{date, datetime};
     /// assert_eq!(date!(1970-01-01).midnight(), datetime!(1970-01-01 0:00));
     /// ```
     </span><span class="kw">pub const fn </span>midnight(<span class="self">self</span>) -&gt; PrimitiveDateTime {
         PrimitiveDateTime::new(<span class="self">self</span>, Time::MIDNIGHT)
     }

     <span class="doccomment">/// Create a [`PrimitiveDateTime`] using the existing date and the provided [`Time`].
     ///
     /// ```rust
     /// # use time_macros::{date, datetime, time};
     /// assert_eq!(
     ///     date!(1970-01-01).with_time(time!(0:00)),
     ///     datetime!(1970-01-01 0:00),
     /// );
     /// ```
     </span><span class="kw">pub const fn </span>with_time(<span class="self">self</span>, time: Time) -&gt; PrimitiveDateTime {
         PrimitiveDateTime::new(<span class="self">self</span>, time)
     }

     <span class="doccomment">/// Attempt to create a [`PrimitiveDateTime`] using the existing date and the provided time.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert!(date!(1970 - 01 - 01).with_hms(0, 0, 0).is_ok());
     /// assert!(date!(1970 - 01 - 01).with_hms(24, 0, 0).is_err());
     /// ```
     </span><span class="kw">pub const fn </span>with_hms(
         <span class="self">self</span>,
         hour: u8,
         minute: u8,
         second: u8,
     ) -&gt; <span class="prelude-ty">Result</span>&lt;PrimitiveDateTime, error::ComponentRange&gt; {
         <span class="prelude-val">Ok</span>(PrimitiveDateTime::new(
             <span class="self">self</span>,
             <span class="macro">const_try!</span>(Time::from_hms(hour, minute, second)),
         ))
     }

     <span class="doccomment">/// Attempt to create a [`PrimitiveDateTime`] using the existing date and the provided time.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert!(date!(1970 - 01 - 01).with_hms_milli(0, 0, 0, 0).is_ok());
     /// assert!(date!(1970 - 01 - 01).with_hms_milli(24, 0, 0, 0).is_err());
     /// ```
     </span><span class="kw">pub const fn </span>with_hms_milli(
         <span class="self">self</span>,
         hour: u8,
         minute: u8,
         second: u8,
         millisecond: u16,
     ) -&gt; <span class="prelude-ty">Result</span>&lt;PrimitiveDateTime, error::ComponentRange&gt; {
         <span class="prelude-val">Ok</span>(PrimitiveDateTime::new(
             <span class="self">self</span>,
             <span class="macro">const_try!</span>(Time::from_hms_milli(hour, minute, second, millisecond)),
         ))
     }

     <span class="doccomment">/// Attempt to create a [`PrimitiveDateTime`] using the existing date and the provided time.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert!(date!(1970 - 01 - 01).with_hms_micro(0, 0, 0, 0).is_ok());
     /// assert!(date!(1970 - 01 - 01).with_hms_micro(24, 0, 0, 0).is_err());
     /// ```
     </span><span class="kw">pub const fn </span>with_hms_micro(
         <span class="self">self</span>,
         hour: u8,
         minute: u8,
         second: u8,
         microsecond: u32,
     ) -&gt; <span class="prelude-ty">Result</span>&lt;PrimitiveDateTime, error::ComponentRange&gt; {
         <span class="prelude-val">Ok</span>(PrimitiveDateTime::new(
             <span class="self">self</span>,
             <span class="macro">const_try!</span>(Time::from_hms_micro(hour, minute, second, microsecond)),
         ))
     }

     <span class="doccomment">/// Attempt to create a [`PrimitiveDateTime`] using the existing date and the provided time.
     ///
     /// ```rust
     /// # use time_macros::date;
     /// assert!(date!(1970 - 01 - 01).with_hms_nano(0, 0, 0, 0).is_ok());
     /// assert!(date!(1970 - 01 - 01).with_hms_nano(24, 0, 0, 0).is_err());
     /// ```
     </span><span class="kw">pub const fn </span>with_hms_nano(
         <span class="self">self</span>,
         hour: u8,
         minute: u8,
         second: u8,
         nanosecond: u32,
     ) -&gt; <span class="prelude-ty">Result</span>&lt;PrimitiveDateTime, error::ComponentRange&gt; {
         <span class="prelude-val">Ok</span>(PrimitiveDateTime::new(
             <span class="self">self</span>,
             <span class="macro">const_try!</span>(Time::from_hms_nano(hour, minute, second, nanosecond)),
         ))
     }
 }
 <span class="comment">// endregion attach time

 // region: formatting &amp; parsing
 </span><span class="attribute">#[cfg(feature = <span class="string">&quot;formatting&quot;</span>)]
 </span><span class="kw">impl </span>Date {
     <span class="doccomment">/// Format the `Date` using the provided [format description](crate::format_description).
     </span><span class="kw">pub fn </span>format_into(
         <span class="self">self</span>,
         output: <span class="kw-2">&amp;mut </span><span class="kw">impl </span>io::Write,
         format: <span class="kw-2">&amp;</span>(<span class="kw">impl </span>Formattable + <span class="question-mark">?</span>Sized),
     ) -&gt; <span class="prelude-ty">Result</span>&lt;usize, error::Format&gt; {
         format.format_into(output, <span class="prelude-val">Some</span>(<span class="self">self</span>), <span class="prelude-val">None</span>, <span class="prelude-val">None</span>)
     }

     <span class="doccomment">/// Format the `Date` using the provided [format description](crate::format_description).
     ///
     /// ```rust
     /// # use time::{format_description};
     /// # use time_macros::date;
     /// let format = format_description::parse(&quot;[year]-[month]-[day]&quot;)?;
     /// assert_eq!(date!(2020 - 01 - 02).format(&amp;format)?, &quot;2020-01-02&quot;);
     /// # Ok::&lt;_, time::Error&gt;(())
     /// ```
     </span><span class="kw">pub fn </span>format(<span class="self">self</span>, format: <span class="kw-2">&amp;</span>(<span class="kw">impl </span>Formattable + <span class="question-mark">?</span>Sized)) -&gt; <span class="prelude-ty">Result</span>&lt;String, error::Format&gt; {
         format.format(<span class="prelude-val">Some</span>(<span class="self">self</span>), <span class="prelude-val">None</span>, <span class="prelude-val">None</span>)
     }
 }

 <span class="attribute">#[cfg(feature = <span class="string">&quot;parsing&quot;</span>)]
 </span><span class="kw">impl </span>Date {
     <span class="doccomment">/// Parse a `Date` from the input using the provided [format
     /// description](crate::format_description).
     ///
     /// ```rust
     /// # use time::Date;
     /// # use time_macros::{date, format_description};
     /// let format = format_description!(&quot;[year]-[month]-[day]&quot;);
     /// assert_eq!(Date::parse(&quot;2020-01-02&quot;, &amp;format)?, date!(2020 - 01 - 02));
     /// # Ok::&lt;_, time::Error&gt;(())
     /// ```
     </span><span class="kw">pub fn </span>parse(
         input: <span class="kw-2">&amp;</span>str,
         description: <span class="kw-2">&amp;</span>(<span class="kw">impl </span>Parsable + <span class="question-mark">?</span>Sized),
     ) -&gt; <span class="prelude-ty">Result</span>&lt;<span class="self">Self</span>, error::Parse&gt; {
         description.parse_date(input.as_bytes())
     }
 }

 <span class="kw">impl </span>fmt::Display <span class="kw">for </span>Date {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; fmt::Result {
         <span class="kw">if </span><span class="macro">cfg!</span>(feature = <span class="string">&quot;large-dates&quot;</span>) &amp;&amp; <span class="self">self</span>.year().abs() &gt;= <span class="number">10_000 </span>{
             <span class="macro">write!</span>(
                 f,
                 <span class="string">&quot;{:+}-{:02}-{:02}&quot;</span>,
                 <span class="self">self</span>.year(),
                 <span class="self">self</span>.month() <span class="kw">as </span>u8,
                 <span class="self">self</span>.day()
             )
         } <span class="kw">else </span>{
             <span class="macro">write!</span>(
                 f,
                 <span class="string">&quot;{:0width$}-{:02}-{:02}&quot;</span>,
                 <span class="self">self</span>.year(),
                 <span class="self">self</span>.month() <span class="kw">as </span>u8,
                 <span class="self">self</span>.day(),
                 width = <span class="number">4 </span>+ (<span class="self">self</span>.year() &lt; <span class="number">0</span>) <span class="kw">as </span>usize
             )
         }
     }
 }

 <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Date {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;(), fmt::Error&gt; {
         fmt::Display::fmt(<span class="self">self</span>, f)
     }
 }
 <span class="comment">// endregion formatting &amp; parsing

 // region: trait impls
 </span><span class="kw">impl </span>Add&lt;Duration&gt; <span class="kw">for </span>Date {
     <span class="kw">type </span>Output = <span class="self">Self</span>;

     <span class="kw">fn </span>add(<span class="self">self</span>, duration: Duration) -&gt; <span class="self">Self</span>::Output {
         <span class="self">self</span>.checked_add(duration)
             .expect(<span class="string">&quot;overflow adding duration to date&quot;</span>)
     }
 }

 <span class="kw">impl </span>Add&lt;StdDuration&gt; <span class="kw">for </span>Date {
     <span class="kw">type </span>Output = <span class="self">Self</span>;

     <span class="kw">fn </span>add(<span class="self">self</span>, duration: StdDuration) -&gt; <span class="self">Self</span>::Output {
         <span class="self">Self</span>::from_julian_day(
             <span class="self">self</span>.to_julian_day() + (duration.as_secs() / Second.per(Day) <span class="kw">as </span>u64) <span class="kw">as </span>i32,
         )
         .expect(<span class="string">&quot;overflow adding duration to date&quot;</span>)
     }
 }

 <span class="macro">impl_add_assign!</span>(Date: Duration, StdDuration);

 <span class="kw">impl </span>Sub&lt;Duration&gt; <span class="kw">for </span>Date {
     <span class="kw">type </span>Output = <span class="self">Self</span>;

     <span class="kw">fn </span>sub(<span class="self">self</span>, duration: Duration) -&gt; <span class="self">Self</span>::Output {
         <span class="self">self</span>.checked_sub(duration)
             .expect(<span class="string">&quot;overflow subtracting duration from date&quot;</span>)
     }
 }

 <span class="kw">impl </span>Sub&lt;StdDuration&gt; <span class="kw">for </span>Date {
     <span class="kw">type </span>Output = <span class="self">Self</span>;

     <span class="kw">fn </span>sub(<span class="self">self</span>, duration: StdDuration) -&gt; <span class="self">Self</span>::Output {
         <span class="self">Self</span>::from_julian_day(
             <span class="self">self</span>.to_julian_day() - (duration.as_secs() / Second.per(Day) <span class="kw">as </span>u64) <span class="kw">as </span>i32,
         )
         .expect(<span class="string">&quot;overflow subtracting duration from date&quot;</span>)
     }
 }

 <span class="macro">impl_sub_assign!</span>(Date: Duration, StdDuration);

 <span class="kw">impl </span>Sub <span class="kw">for </span>Date {
     <span class="kw">type </span>Output = Duration;

     <span class="kw">fn </span>sub(<span class="self">self</span>, other: <span class="self">Self</span>) -&gt; <span class="self">Self</span>::Output {
         Duration::days((<span class="self">self</span>.to_julian_day() - other.to_julian_day()) <span class="kw">as _</span>)
     }
 }
 <span class="comment">// endregion trait impls
 </span></code></pre></div>
 </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="time" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html>