Added support for time zones. Thanks Luke Plant for the review. Fixed #2626.

For more information on this project, see this thread:
http://groups.google.com/group/django-developers/browse_thread/thread/cf0423bbb85b1bbf



git-svn-id: http://code.djangoproject.com/svn/django/trunk@17106 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/utils/timezone.py

@@ -0,0 +1,18 @@
+import copy
+import pickle
+from django.utils.timezone import UTC, LocalTimezone
+from django.utils import unittest
+
+class TimezoneTests(unittest.TestCase):
+
+    def test_copy(self):
+        self.assertIsInstance(copy.copy(UTC()), UTC)
+        self.assertIsInstance(copy.copy(LocalTimezone()), LocalTimezone)
+
+    def test_deepcopy(self):
+        self.assertIsInstance(copy.deepcopy(UTC()), UTC)
+        self.assertIsInstance(copy.deepcopy(LocalTimezone()), LocalTimezone)
+
+    def test_pickling_unpickling(self):
+        self.assertIsInstance(pickle.loads(pickle.dumps(UTC())), UTC)
+        self.assertIsInstance(pickle.loads(pickle.dumps(LocalTimezone())), LocalTimezone)