diff --git a/usr.bin/calendar/calendars/calendar.freebsd b/usr.bin/calendar/calendars/calendar.freebsd
index c2a7895725bf..9144dd79508d 100644
--- a/usr.bin/calendar/calendars/calendar.freebsd
+++ b/usr.bin/calendar/calendars/calendar.freebsd
@@ -66,6 +66,7 @@
 06/24	Chris Faulhaber <jedgar@FreeBSD.org> born in Springfield, Illinois, United States, 1971
 06/26	Brian Somers <brian@FreeBSD.org> born in Amersham, Buckinghamshire, United Kingdom, 1967
 06/29	Daniel Harris <dannyboy@FreeBSD.org> born in Lubbock, Texas, United States, 1985
+06/30	Guido van Rooij <guido@FreeBSD.org> born in Best, Noord-Brabant, Netherlands, 1965
 07/02	Mark Christopher Ovens <marko@FreeBSD.org> born in Preston, Lancashire, United Kingdom, 1958
 07/04	Motoyuki Konno <motoyuki@FreeBSD.org> born in Musashino, Tokyo, Japan, 1969
 07/07	George Reid <greid@FreeBSD.org> born in Frimley, Hampshire, United Kingdom, 1983