LOGCXX-493: Added granularity to the docs of getTimeStamp.
diff --git a/src/main/include/log4cxx/spi/loggingevent.h b/src/main/include/log4cxx/spi/loggingevent.h
index f2b2a55..8f6dec0 100644
--- a/src/main/include/log4cxx/spi/loggingevent.h
+++ b/src/main/include/log4cxx/spi/loggingevent.h
@@ -112,7 +112,8 @@
                              return threadName;
                         }
 
-                        /** Return the timeStamp of this event. */
+                        /** The number of microseconds elapsed from 01.01.1970 until logging event
+                         was created. */
                         inline log4cxx_time_t getTimeStamp() const
                                 { return timeStamp; }