diff --git a/usr.bin/calendar/calendars/calendar.computer b/usr.bin/calendar/calendars/calendar.computer
index 80ddd46b0d7f..81c5815d58ac 100644
--- a/usr.bin/calendar/calendars/calendar.computer
+++ b/usr.bin/calendar/calendars/calendar.computer
@@ -38,6 +38,7 @@
 05/01	First BASIC program run at Dartmouth, 1964
 05/06	EDSAC demonstrated, 1949
 05/16	First report on SNOBOL distributed (within BTL), 1963
+05/18	RISC-V project born, 2010
 05/21	DEC announces PDP-8, 1965
 05/22	Ethernet first described, 1973
 05/27	First joint meeting of U.S. and European ALGOL definition cte., 1958