A federal holiday since 2021. ok?
Index: usr.bin/calendar/calendars/calendar.usholiday =================================================================== RCS file: /cvs/src/usr.bin/calendar/calendars/calendar.usholiday,v retrieving revision 1.9 diff -u -p -r1.9 calendar.usholiday --- usr.bin/calendar/calendars/calendar.usholiday 19 Jan 2015 18:07:47 -0000 1.9 +++ usr.bin/calendar/calendars/calendar.usholiday 15 May 2023 08:51:58 -0000 @@ -22,6 +22,7 @@ 05/SatThird Armed Forces Day (3rd Saturday of May) 05/MonLast Memorial Day (Last Monday of May) 06/SunThird Father's Day (3rd Sunday of June) +06/19 Juneteenth 06/21* Summer Solstice 07/04 Independence Day 09/MonFirst Labor Day (1st Monday of September)
