diff --git lib/time.rb lib/time.rb
index 07196a3..bad2f47 100644
--- lib/time.rb
+++ lib/time.rb
@@ -256,10 +256,12 @@ class Time
       off = nil
       off = zone_offset(zone, off_year) if zone
 
-      if off
-        now = now.getlocal(off) if now.utc_offset != off
-      else
-        now = now.getlocal
+      if now.kind_of?(Time)
+        if off
+          now = now.getlocal(off) if now.utc_offset != off
+        else
+          now = now.getlocal
+        end
       end
 
       usec = nil
diff --git test/test_time.rb test/test_time.rb
index 5f7ff1a..5e99b40 100644
--- test/test_time.rb
+++ test/test_time.rb
@@ -497,4 +497,23 @@ class TestTimeExtension < Test::Unit::TestCase # :nodoc:
     define_method(test) {__send__(sub, :xmlschema)}
     define_method(test.sub(/xmlschema/, 'iso8601')) {__send__(sub, :iso8601)}
   end
+
+  def test_parse_with_various_object
+    d  = Date.new(2010, 10, 28)
+    dt = DateTime.new(2010, 10, 28)
+    md = MyDate.new(10, 28, 2010)
+
+    t = Time.local(2010, 10, 28, 21, 26, 00)
+    assert_equal(t, Time.parse("21:26",  d))
+    assert_equal(t, Time.parse("21:26", dt))
+    assert_equal(t, Time.parse("21:26", md))
+  end
+
+  class MyDate
+    attr_reader :mon, :day, :year
+
+    def initialize(mon, day, year)
+      @mon, @day, @year = mon, day, year
+    end
+  end
 end