diff --git a/cms/envs/common.py b/cms/envs/common.py
index 854204d8fe3f0e40c274be86980e8fe9fad7eb7c..55b241fa1a3473882dcd7fe88c1567ed4aa4ec9a 100644
--- a/cms/envs/common.py
+++ b/cms/envs/common.py
@@ -254,9 +254,8 @@ FEATURES = {
     'ENABLE_ENROLLMENT_TRACK_USER_PARTITION': True,
 
     # Whether archived courses (courses with end dates in the past) should be
-    # shown in Studio in a separate list. Note that attempting to enable this
-    # failed on stage-- see EDUCATOR-1134.
-    'ENABLE_SEPARATE_ARCHIVED_COURSES': False
+    # shown in Studio in a separate list.
+    'ENABLE_SEPARATE_ARCHIVED_COURSES': True
 }
 
 ENABLE_JASMINE = False
diff --git a/common/lib/xmodule/xmodule/course_module.py b/common/lib/xmodule/xmodule/course_module.py
index 29e3a925f59843da97376eb1e00568a882e2c2df..8a3f8e2c925318f93778c49c83773b71ae6f43e5 100644
--- a/common/lib/xmodule/xmodule/course_module.py
+++ b/common/lib/xmodule/xmodule/course_module.py
@@ -1451,4 +1451,13 @@ class CourseSummary(object):
         """
         Returns whether the course has ended.
         """
-        return course_metadata_utils.has_course_ended(self.end)
+        try:
+            return course_metadata_utils.has_course_ended(self.end)
+        except TypeError as e:
+            log.warning(
+                "Course '{course_id}' has an improperly formatted end date '{end_date}'. Error: '{err}'.".format(
+                    course_id=unicode(self.id), end_date=self.end, err=e
+                )
+            )
+            modified_end = self.end.replace(tzinfo=utc)
+            return course_metadata_utils.has_course_ended(modified_end)
diff --git a/common/lib/xmodule/xmodule/tests/test_course_module.py b/common/lib/xmodule/xmodule/tests/test_course_module.py
index a5f8b723713b2cb681faf24a7e4331af6bc69b98..99e89b680ef195820f4c51015a932a995efecc05 100644
--- a/common/lib/xmodule/xmodule/tests/test_course_module.py
+++ b/common/lib/xmodule/xmodule/tests/test_course_module.py
@@ -2,6 +2,7 @@
 import ddt
 import unittest
 from datetime import datetime, timedelta
+from dateutil import parser
 
 import itertools
 from fs.memoryfs import MemoryFS
@@ -142,6 +143,16 @@ class HasEndedMayCertifyTestCase(unittest.TestCase):
         self.assertFalse(self.future_noshow_certs.may_certify())
 
 
+class CourseSummaryHasEnded(unittest.TestCase):
+    """ Test for has_ended method when end date is missing timezone information. """
+
+    def test_course_end(self):
+        test_course = get_dummy_course("2012-01-01T12:00")
+        bad_end_date = parser.parse("2012-02-21 10:28:45")
+        summary = xmodule.course_module.CourseSummary(test_course.id, end=bad_end_date)
+        self.assertTrue(summary.has_ended())
+
+
 @ddt.ddt
 class IsNewCourseTestCase(unittest.TestCase):
     """Make sure the property is_new works on courses"""