diff --git a/ChangeLog b/ChangeLog
index ee69ea97c5..d4621b0fb1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Feb 22 19:22:31 2012  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* reverted 34739 for test/date.
+
 Wed Feb 22 19:08:55 2012  Tanaka Akira  <akr@fsij.org>
 
 	* ext/curses/extconf.rb: refactored.
diff --git a/test/date/test_date_attr.rb b/test/date/test_date_attr.rb
index 2f0246296d..88a54d7461 100644
--- a/test/date/test_date_attr.rb
+++ b/test/date/test_date_attr.rb
@@ -96,6 +96,7 @@ class TestDateAttr < Test::Unit::TestCase
   end
 
   def test_nth_kday
+    skip unless Date.new.respond_to?(:nth_kday?, true)
     assert_equal(false, Date.new(2001,1,14).__send__(:nth_kday?, 1,0))
     assert_equal(true, Date.new(2001,1,14).__send__(:nth_kday?, 2,0))
     assert_equal(false, Date.new(2001,1,14).__send__(:nth_kday?, 3,0))
@@ -106,6 +107,6 @@ class TestDateAttr < Test::Unit::TestCase
     assert_equal(true, Date.new(2001,1,14).__send__(:nth_kday?, -3,0))
     assert_equal(false, Date.new(2001,1,14).__send__(:nth_kday?, -4,0))
     assert_equal(false, Date.new(2001,1,14).__send__(:nth_kday?, -5,0))
-  end if Date.new.respond_to?(:nth_kday?, true)
+  end
 
 end
diff --git a/test/date/test_date_base.rb b/test/date/test_date_base.rb
index 81be8907ea..1f3d8c0a55 100644
--- a/test/date/test_date_base.rb
+++ b/test/date/test_date_base.rb
@@ -53,6 +53,7 @@ class TestDateBase < Test::Unit::TestCase
   end
 
   def test_ordinal__julian
+    skip unless defined?(Calendar)
     for j in @from..@to
       m, d, y = julian_from_absolute(absolute_from_julian_day_number(j))
       j0 = julian_day_number_from_absolute(absolute_from_julian(12, 31, y - 1))
@@ -67,6 +68,7 @@ class TestDateBase < Test::Unit::TestCase
   end
 
   def test_ordinal__gregorian
+    skip unless defined?(Calendar)
     for j in @from..@to
       m, d, y = gregorian_from_absolute(absolute_from_julian_day_number(j))
       j0 =
@@ -82,6 +84,7 @@ class TestDateBase < Test::Unit::TestCase
   end
 
   def test_civil__julian
+    skip unless defined?(Calendar)
     for j in @from..@to
       m, d, y = julian_from_absolute(absolute_from_julian_day_number(j))
       j2 = julian_day_number_from_absolute(absolute_from_julian(m, d, y))
@@ -96,6 +99,7 @@ class TestDateBase < Test::Unit::TestCase
   end
 
   def test_civil__gregorian
+    skip unless defined?(Calendar)
     for j in @from..@to
       m, d, y = gregorian_from_absolute(absolute_from_julian_day_number(j))
       j2 = julian_day_number_from_absolute(absolute_from_gregorian(m, d, y))
@@ -110,6 +114,7 @@ class TestDateBase < Test::Unit::TestCase
   end
 
   def test_commercial__gregorian
+    skip unless defined?(Calendar)
     for j in @from..@to
       w, d, y = iso_from_absolute(absolute_from_julian_day_number(j))
       j2 = julian_day_number_from_absolute(absolute_from_iso(w, d, y))
@@ -124,6 +129,7 @@ class TestDateBase < Test::Unit::TestCase
   end
 
   def test_weeknum
+    skip unless defined?(Calendar)
     for j in @from..@to
       for k in 0..1
 	wy, ww, wd = Date.__send__(:jd_to_weeknum, j, k, Date::GREGORIAN)
@@ -134,6 +140,7 @@ class TestDateBase < Test::Unit::TestCase
   end
 
   def test_weeknum__2
+    skip unless defined?(Calendar)
     for j in @from4t..@to4t
       d = Date.jd(j)
       t = Time.mktime(d.year, d.mon, d.mday)
@@ -151,6 +158,7 @@ class TestDateBase < Test::Unit::TestCase
   end
 
   def test_nth_kday
+    skip unless defined?(Calendar)
     skip unless (Date.respond_to?(:nth_kday_to_jd, true) &&
 		 Date.respond_to?(:jd_to_nth_kday, true))
     for y in 1601..2401
@@ -431,4 +439,4 @@ class TestDateBase < Test::Unit::TestCase
     assert_nil(DateTime.__send__(valid_time_p, 24,1,1))
   end
 
-end if defined?(Calendar)
+end
diff --git a/test/date/test_date_new.rb b/test/date/test_date_new.rb
index c46cb4664b..0bbbfee44b 100644
--- a/test/date/test_date_new.rb
+++ b/test/date/test_date_new.rb
@@ -202,6 +202,7 @@ class TestDateNew < Test::Unit::TestCase
   end
 
   def test_weeknum
+    skip unless Date.respond_to?(:weeknum, true)
     d = Date.__send__(:weeknum)
     dt = DateTime.__send__(:weeknum)
     assert_equal([-4712, 1, 1], [d.year, d.mon, d.mday])
@@ -221,9 +222,10 @@ class TestDateNew < Test::Unit::TestCase
     assert_raise(ArgumentError) do
       Date.__send__(:weeknum, 1999,-53,-1, 0)
     end
-  end if Date.respond_to?(:weeknum, true)
+  end
 
   def test_nth_kday
+    skip unless Date.respond_to?(:nth_kday, true)
     d = Date.__send__(:nth_kday)
     dt = DateTime.__send__(:nth_kday)
     assert_equal([-4712, 1, 1], [d.year, d.mon, d.mday])
@@ -243,7 +245,7 @@ class TestDateNew < Test::Unit::TestCase
     assert_raise(ArgumentError) do
       Date.__send__(:nth_kday, 2006,5, -5,0)
     end
-  end if Date.respond_to?(:nth_kday, true)
+  end
 
   def test_today
     z = Time.now
diff --git a/test/date/test_switch_hitter.rb b/test/date/test_switch_hitter.rb
index 7206904175..8431d40a29 100644
--- a/test/date/test_switch_hitter.rb
+++ b/test/date/test_switch_hitter.rb
@@ -570,7 +570,8 @@ class TestSH < Test::Unit::TestCase
   end
 
   def test_base
+    skip unless defined?(Date.test_all)
     assert_equal(true, Date.test_all)
-  end if defined?(Date.test_all)
+  end
 
 end