diff --git a/ChangeLog b/ChangeLog
index 45f38f925a..5507fc0aea 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jul  2 05:35:43 2012  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* ext/date/date_core.c (d_lite_marshal_load): accepts old dump.
+
 Mon Jul  2 03:21:53 2012  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
 
 	* README.EXT.ja: fixed args of have_struct_member() ,
diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index 82d078a0dd..8096fd7bfb 100644
--- a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -7272,15 +7272,26 @@ d_lite_marshal_load(VALUE self, VALUE a)
 	rb_raise(rb_eTypeError, "expected an array");
 
     switch (RARRAY_LEN(a)) {
-      case 3:
+      case 2: /* 1.6.x */
+      case 3: /* 1.8.x, 1.9.2 */
 	{
 	    VALUE ajd, of, sg, nth, sf;
 	    int jd, df, rof;
 	    double rsg;
 
-	    ajd = RARRAY_PTR(a)[0];
-	    of = RARRAY_PTR(a)[1];
-	    sg = RARRAY_PTR(a)[2];
+
+	    if  (RARRAY_LEN(a) == 2) {
+		ajd = f_sub(RARRAY_PTR(a)[0], half_days_in_day);
+		of = INT2FIX(0);
+		sg = RARRAY_PTR(a)[1];
+		if (!k_numeric_p(sg))
+		    sg = DBL2NUM(RTEST(sg) ? GREGORIAN : JULIAN);
+	    }
+	    else {
+		ajd = RARRAY_PTR(a)[0];
+		of = RARRAY_PTR(a)[1];
+		sg = RARRAY_PTR(a)[2];
+	    }
 
 	    old_to_new(ajd, of, sg,
 		       &nth, &jd, &df, &sf, &rof, &rsg);
@@ -7336,6 +7347,16 @@ d_lite_marshal_load(VALUE self, VALUE a)
     return self;
 }
 
+/* :nodoc: */
+static VALUE
+date_s__load(VALUE klass, VALUE s)
+{
+    VALUE a, obj;
+
+    a = rb_marshal_load(s);
+    obj = d_lite_s_alloc(klass);
+    return d_lite_marshal_load(obj, a);
+}
 
 /* datetime */
 
@@ -9674,6 +9695,7 @@ Init_date_core(void)
 #endif
     rb_define_method(cDate, "marshal_dump", d_lite_marshal_dump, 0);
     rb_define_method(cDate, "marshal_load", d_lite_marshal_load, 1);
+    rb_define_singleton_method(cDate, "_load", date_s__load, 1);
 
     /* datetime */
 
diff --git a/test/date/test_switch_hitter.rb b/test/date/test_switch_hitter.rb
index 8431d40a29..273474eb86 100644
--- a/test/date/test_switch_hitter.rb
+++ b/test/date/test_switch_hitter.rb
@@ -472,7 +472,39 @@ class TestSH < Test::Unit::TestCase
     period2_iter(+cm_period * (1 << 64) - 3, +cm_period * (1 << 64) + 3)
   end
 
-  def test_marshal
+=begin
+  def test_marshal14
+    s = "\x04\x03u:\x01\x04Date\x01\v\x04\x03[\x01\x02i\x03\xE8i%T"
+    d = Marshal.load(s)
+    assert_equal(Rational(4903887,2), d.ajd)
+    assert_equal(0, d.send(:offset))
+    assert_equal(Date::GREGORIAN, d.start)
+  end
+
+  def test_marshal16
+    s = "\x04\x06u:\tDate\x0F\x04\x06[\ai\x03\xE8i%T"
+    d = Marshal.load(s)
+    assert_equal(Rational(4903887,2), d.ajd)
+    assert_equal(0, d.send(:offset))
+    assert_equal(Date::GREGORIAN, d.start)
+  end
+
+  def test_marshal18
+    s = "\x04\bu:\tDateP\x04\b[\bo:\rRational\a:\x0F@numeratori\x03\xCF\xD3J:\x11@denominatori\ai\x00o:\x13Date::Infinity\x06:\a@di\xFA"
+    d = Marshal.load(s)
+    assert_equal(Rational(4903887,2), d.ajd)
+    assert_equal(0, d.send(:offset))
+    assert_equal(Date::GREGORIAN, d.start)
+
+    s = "\x04\bu:\rDateTime`\x04\b[\bo:\rRational\a:\x0F@numeratorl+\b\xC9\xB0\x81\xBD\x02\x00:\x11@denominatori\x02\xC0\x12o;\x00\a;\x06i\b;\ai\ro:\x13Date::Infinity\x06:\a@di\xFA"
+    d = Marshal.load(s)
+    assert_equal(Rational(11769327817,4800), d.ajd)
+    assert_equal(Rational(9,24), d.offset)
+    assert_equal(Date::GREGORIAN, d.start)
+  end
+=end
+
+  def test_marshal192
     s = "\x04\bU:\tDate[\bU:\rRational[\ai\x03\xCF\xD3Ji\ai\x00o:\x13Date::Infinity\x06:\a@di\xFA"
     d = Marshal.load(s)
     assert_equal(Rational(4903887,2), d.ajd)