diff --git a/ChangeLog b/ChangeLog
index cad4cff7ae..9ceaca2094 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Mon May  5 01:12:27 2014  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* ext/date/date_core.c (rt_rewrite_frags): a new feature (not a
+	  bug fix) of strptime.  applies offset even if the given date is
+	  not local time (%s and %Q).  This is an exceptional feature and
+	  I do NOT recommend to use this at all.  Thank you git community.
+
 Sun May  4 20:51:32 2014  Tanaka Akira  <akr@fsij.org>
 
 	* lib/time.rb (Time.force_zone!): Use usual local time if it has
diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index 1685d15e61..ee360b4afb 100644
--- a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -1,5 +1,5 @@
 /*
-  date_core.c: Coded by Tadayoshi Funaba 2010-2013
+  date_core.c: Coded by Tadayoshi Funaba 2010-2014
 */
 
 #include "ruby.h"
@@ -3667,7 +3667,11 @@ rt_rewrite_frags(VALUE hash)
 
     seconds = ref_hash("seconds");
     if (!NIL_P(seconds)) {
-	VALUE d, h, min, s, fr;
+	VALUE offset, d, h, min, s, fr;
+
+	offset = ref_hash("offset");
+	if (!NIL_P(offset))
+	    seconds = f_add(seconds, offset);
 
 	d = f_idiv(seconds, INT2FIX(DAY_IN_SECONDS));
 	fr = f_mod(seconds, INT2FIX(DAY_IN_SECONDS));
@@ -3687,7 +3691,6 @@ rt_rewrite_frags(VALUE hash)
 	set_hash("sec", s);
 	set_hash("sec_fraction", fr);
 	del_hash("seconds");
-	del_hash("offset");
     }
     return hash;
 }
diff --git a/test/date/test_date_strptime.rb b/test/date/test_date_strptime.rb
index 40d4e22a72..5270bc3c1c 100644
--- a/test/date/test_date_strptime.rb
+++ b/test/date/test_date_strptime.rb
@@ -493,4 +493,21 @@ class TestDateStrptime < Test::Unit::TestCase
     assert_equal(s0, s)
   end
 
+  def test_sz
+    d = DateTime.strptime('0 -0200', '%s %z')
+    assert_equal([1969, 12, 31, 22, 0, 0], [d.year, d.mon, d.mday, d.hour, d.min, d.sec])
+    assert_equal(Rational(-2, 24), d.offset)
+    d = DateTime.strptime('9 +0200', '%s %z')
+    assert_equal([1970, 1, 1, 2, 0, 9], [d.year, d.mon, d.mday, d.hour, d.min, d.sec])
+    assert_equal(Rational(2, 24), d.offset)
+
+    d = DateTime.strptime('0 -0200', '%Q %z')
+    assert_equal([1969, 12, 31, 22, 0, 0], [d.year, d.mon, d.mday, d.hour, d.min, d.sec])
+    assert_equal(Rational(-2, 24), d.offset)
+    d = DateTime.strptime('9000 +0200', '%Q %z')
+    assert_equal([1970, 1, 1, 2, 0, 9], [d.year, d.mon, d.mday, d.hour, d.min, d.sec])
+    assert_equal(Rational(2, 24), d.offset)
+
+  end
+
 end