diff --git a/usr.bin/calendar/calendars/calendar.christian b/usr.bin/calendar/calendars/calendar.christian
index 7f565d662934..5a8ca141672a 100644
--- a/usr.bin/calendar/calendars/calendar.christian
+++ b/usr.bin/calendar/calendars/calendar.christian
@@ -14,3 +14,4 @@
 10/18	Feast Day of St. Luke
 12/03*	First Sunday of Advent (4th Sunday before Christmas)
 12/06	St. Nicholas' Day
+12/25	Feast of the Nativity (Christmas)