diff --git a/usr.bin/calendar/calendars/calendar.holiday b/usr.bin/calendar/calendars/calendar.holiday
index 891c7f5376f2..a5e5dda4dfd4 100644
--- a/usr.bin/calendar/calendars/calendar.holiday
+++ b/usr.bin/calendar/calendars/calendar.holiday
@@ -447,7 +447,7 @@
 10/20	Kenyatta Day in Kenya
 10/21	Armed Forces Day in Honduras
 10/21	Revolution Days (2 days) in Somalia
-10/23	Chulalongkron's Day in Thailand
+10/23	King Chulalongkorn Day in Thailand
 10/24	Independence Day in Zambia
 10/24	United Nations Day
 10/25	Taiwan Restoration Day in Taiwan