diff -up at-3.1.10/at.1.in.hyphen at-3.1.10/at.1.in
--- at-3.1.10/at.1.in.hyphen	2009-02-19 08:47:39.000000000 +0100
+++ at-3.1.10/at.1.in	2009-02-19 08:48:19.000000000 +0100
@@ -89,7 +89,9 @@ or giving a date of the form
 or
 .B MM/DD/YY
 or
-.B DD.MM.YY.
+.B DD.MM.YY
+or
+.B YYYY-MM-DD.
 The specification of a date
 .I must
 follow the specification of the time of day.