tweak definition

Author: tbrowder

doc/Type/DateTime.pod6

@@ -278,7 +278,7 @@ Returns the L<Julian Date|https://en.wikipedia.org/wiki/Julian_day> (JD) for the
 The C<julian-date> starts at zero at the epoch starting at noon UTC on
 I<Monday, January 1, 4713 BC>, on the Gregorian calendar (the calendar
 in use in much of the world and in international commerce and travel)
-and is used in astronomy to define celestial objects' transits at the
+and is used in astronomy to define times of celestial objects transiting the
 Earth's Prime Meridian.
 
 =head2 method modified-julian-date