diff --git a/ChangeLog b/ChangeLog
index 4415eeb842..5454d68999 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Dec 30 22:44:50 2007  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* lib/date.rb (_valid_time?): I'm not sure to recommend such an
+	  expression.  but anyway it is acceptable now.  [ruby-core:14580]
+
 Sun Dec 30 21:54:26 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* parse.y (program, yycompile0): too early to drop lex_lastline in
diff --git a/lib/date.rb b/lib/date.rb
index d2359bf3ba..dec02967f2 100644
--- a/lib/date.rb
+++ b/lib/date.rb
@@ -6,7 +6,7 @@
 # Documentation: William Webber <william@williamwebber.com>
 #
 #--
-# $Id: date.rb,v 2.33 2007-12-22 14:41:34+09 tadf Exp $
+# $Id: date.rb,v 2.34 2007-12-30 21:45:27+09 tadf Exp $
 #++
 #
 # == Overview
@@ -676,9 +676,9 @@ class Date
       h   += 24 if h   < 0
       min += 60 if min < 0
       s   += 60 if s   < 0
-      return unless ((0..23) === h &&
-		     (0..59) === min &&
-		     (0..59) === s) ||
+      return unless ((0...24) === h &&
+		     (0...60) === min &&
+		     (0...60) === s) ||
 		     (24 == h &&
 		       0 == min &&
 		       0 == s)