Revert "Merge pull request #13915 from edx/revert-13794-yro_implement-dateutil"

This reverts commit d59ab18b, reversing
changes made to 0ebab35e.

common/test/acceptance/tests/lms/test_lms_dashboard.py

@@ -10,8 +10,8 @@ from common.test.acceptance.fixtures.course import CourseFixture
 from common.test.acceptance.pages.lms.auto_auth import AutoAuthPage
 from common.test.acceptance.pages.lms.dashboard import DashboardPage
 
-DEFAULT_SHORT_DATE_FORMAT = "%b %d, %Y"
-DEFAULT_DAY_AND_TIME_FORMAT = "%A at %-I%P"
+DEFAULT_SHORT_DATE_FORMAT = '{dt:%b} {dt.day}, {dt.year}'
+TEST_DATE_FORMAT = '{dt:%b} {dt.day}, {dt.year} {dt.hour}:{dt.minute:02}'
 
 
 class BaseLmsDashboardTest(UniqueCourseTest):
@@ -193,7 +193,7 @@ class LmsDashboardPageTest(BaseLmsDashboardTest):
         })
         self.course_fixture.configure_course()
 
-        end_date = course_end_date.strftime(DEFAULT_SHORT_DATE_FORMAT)
+        end_date = DEFAULT_SHORT_DATE_FORMAT.format(dt=course_end_date)
         expected_course_date = "Ended - {end_date}".format(end_date=end_date)
 
         # reload the page for changes to course date changes to appear in dashboard
@@ -226,7 +226,7 @@ class LmsDashboardPageTest(BaseLmsDashboardTest):
         })
         self.course_fixture.configure_course()
 
-        start_date = course_start_date.strftime(DEFAULT_SHORT_DATE_FORMAT)
+        start_date = DEFAULT_SHORT_DATE_FORMAT.format(dt=course_start_date)
         expected_course_date = "Started - {start_date}".format(start_date=start_date)
 
         # reload the page for changes to course date changes to appear in dashboard
@@ -259,7 +259,7 @@ class LmsDashboardPageTest(BaseLmsDashboardTest):
         })
         self.course_fixture.configure_course()
 
-        start_date = course_start_date.strftime(DEFAULT_SHORT_DATE_FORMAT)
+        start_date = DEFAULT_SHORT_DATE_FORMAT.format(dt=course_start_date)
         expected_course_date = "Starts - {start_date}".format(start_date=start_date)
 
         # reload the page for changes to course date changes to appear in dashboard
@@ -293,8 +293,8 @@ class LmsDashboardPageTest(BaseLmsDashboardTest):
         })
         self.course_fixture.configure_course()
 
-        start_date = course_start_date.strftime(DEFAULT_DAY_AND_TIME_FORMAT)
-        expected_course_date = "Starts - {start_date} UTC".format(start_date=start_date)
+        start_date = TEST_DATE_FORMAT.format(dt=course_start_date)
+        expected_course_date = "Starts - {start_date} GMT".format(start_date=start_date)
 
         # reload the page for changes to course date changes to appear in dashboard
         self.dashboard_page.visit()

lms/djangoapps/ccx/tests/test_field_override_performance.py

@@ -229,18 +229,18 @@ class TestFieldOverrideMongoPerformance(FieldOverridePerformanceTestCase):
         #     # of sql queries to default,
         #     # of mongo queries,
         # )
-        ('no_overrides', 1, True, False): (18, 6),
-        ('no_overrides', 2, True, False): (18, 6),
-        ('no_overrides', 3, True, False): (18, 6),
-        ('ccx', 1, True, False): (18, 6),
-        ('ccx', 2, True, False): (18, 6),
-        ('ccx', 3, True, False): (18, 6),
-        ('no_overrides', 1, False, False): (18, 6),
-        ('no_overrides', 2, False, False): (18, 6),
-        ('no_overrides', 3, False, False): (18, 6),
-        ('ccx', 1, False, False): (18, 6),
-        ('ccx', 2, False, False): (18, 6),
-        ('ccx', 3, False, False): (18, 6),
+        ('no_overrides', 1, True, False): (21, 6),
+        ('no_overrides', 2, True, False): (21, 6),
+        ('no_overrides', 3, True, False): (21, 6),
+        ('ccx', 1, True, False): (21, 6),
+        ('ccx', 2, True, False): (21, 6),
+        ('ccx', 3, True, False): (21, 6),
+        ('no_overrides', 1, False, False): (21, 6),
+        ('no_overrides', 2, False, False): (21, 6),
+        ('no_overrides', 3, False, False): (21, 6),
+        ('ccx', 1, False, False): (21, 6),
+        ('ccx', 2, False, False): (21, 6),
+        ('ccx', 3, False, False): (21, 6),
     }
 
 
@@ -252,19 +252,19 @@ class TestFieldOverrideSplitPerformance(FieldOverridePerformanceTestCase):
     __test__ = True
 
     TEST_DATA = {
-        ('no_overrides', 1, True, False): (18, 3),
-        ('no_overrides', 2, True, False): (18, 3),
-        ('no_overrides', 3, True, False): (18, 3),
-        ('ccx', 1, True, False): (18, 3),
-        ('ccx', 2, True, False): (18, 3),
-        ('ccx', 3, True, False): (18, 3),
-        ('ccx', 1, True, True): (19, 3),
-        ('ccx', 2, True, True): (19, 3),
-        ('ccx', 3, True, True): (19, 3),
-        ('no_overrides', 1, False, False): (18, 3),
-        ('no_overrides', 2, False, False): (18, 3),
-        ('no_overrides', 3, False, False): (18, 3),
-        ('ccx', 1, False, False): (18, 3),
-        ('ccx', 2, False, False): (18, 3),
-        ('ccx', 3, False, False): (18, 3),
+        ('no_overrides', 1, True, False): (21, 3),
+        ('no_overrides', 2, True, False): (21, 3),
+        ('no_overrides', 3, True, False): (21, 3),
+        ('ccx', 1, True, False): (21, 3),
+        ('ccx', 2, True, False): (21, 3),
+        ('ccx', 3, True, False): (21, 3),
+        ('ccx', 1, True, True): (22, 3),
+        ('ccx', 2, True, True): (22, 3),
+        ('ccx', 3, True, True): (22, 3),
+        ('no_overrides', 1, False, False): (21, 3),
+        ('no_overrides', 2, False, False): (21, 3),
+        ('no_overrides', 3, False, False): (21, 3),
+        ('ccx', 1, False, False): (21, 3),
+        ('ccx', 2, False, False): (21, 3),
+        ('ccx', 3, False, False): (21, 3),
     }

lms/djangoapps/courseware/context_processor.py

+"""
+This is the courseware context_processor module.
+
+This is meant to simplify the process of sending user preferences (espec. time_zone and pref-lang)
+to the templates without having to append every view file.
+
+"""
+from openedx.core.djangoapps.user_api.errors import UserNotFound, UserAPIInternalError
+from openedx.core.djangoapps.user_api.preferences.api import get_user_preferences
+import request_cache
+
+RETRIEVABLE_PREFERENCES = {
+    'user_timezone': 'time_zone',
+    'user_language': 'pref-lang'
+}
+CACHE_NAME = "context_processor.user_timezone_preferences"
+
+
+def user_timezone_locale_prefs(request):
+    """
+    Checks if request has an authenticated user.
+    If so, sends set (or none if unset) time_zone and language prefs.
+
+    This interacts with the DateUtils to either display preferred or attempt to determine
+    system/browser set time_zones and languages
+
+    """
+    cached_value = request_cache.get_cache(CACHE_NAME)
+    if not cached_value:
+        user_prefs = {
+            'user_timezone': None,
+            'user_language': None,
+        }
+        if hasattr(request, 'user') and request.user.is_authenticated():
+            try:
+                user_preferences = get_user_preferences(request.user)
+            except (UserNotFound, UserAPIInternalError):
+                cached_value.update(user_prefs)
+            else:
+                user_prefs = {
+                    key: user_preferences.get(pref_name, None)
+                    for key, pref_name in RETRIEVABLE_PREFERENCES.iteritems()
+                }
+
+        cached_value.update(user_prefs)
+    return cached_value

lms/djangoapps/courseware/date_summary.py

@@ -4,6 +4,7 @@ page. Each block gives information about a particular
 course-run-specific date which will be displayed to the user.
 """
 from datetime import datetime
+from pytz import timezone, utc
 
 from babel.dates import format_timedelta
 from django.core.urlresolvers import reverse
@@ -12,13 +13,12 @@ from django.utils.translation import ugettext_lazy
 from django.utils.translation import to_locale, get_language
 from edxmako.shortcuts import render_to_string
 from lazy import lazy
-from pytz import utc
 
 from course_modes.models import CourseMode
 from lms.djangoapps.commerce.utils import EcommerceService
 from lms.djangoapps.verify_student.models import VerificationDeadline, SoftwareSecurePhotoVerification
-from openedx.core.lib.time_zone_utils import get_time_zone_abbr, get_user_time_zone
 from student.models import CourseEnrollment
+from openedx.core.lib.time_zone_utils import get_time_zone_abbr
 
 
 class DateSummary(object):
@@ -67,8 +67,12 @@ class DateSummary(object):
 
     @property
     def time_zone(self):
-        """The time zone to display in"""
-        return get_user_time_zone(self.user)
+        """
+        The time zone in which to display -- defaults to UTC
+        """
+        return timezone(
+            self.user.preferences.model.get_value(self.user, "time_zone", "UTC")
+        )
 
     def __init__(self, course, user):
         self.course = course

lms/djangoapps/courseware/tests/test_context_processor.py

+"""
+Unit tests for courseware context_processor
+"""
+from django.contrib.auth.models import AnonymousUser
+from mock import Mock
+
+from student.tests.factories import UserFactory
+from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
+from openedx.core.djangoapps.user_api.preferences.api import set_user_preference
+
+from courseware.context_processor import user_timezone_locale_prefs
+
+
+class UserPrefContextProcessorUnitTest(ModuleStoreTestCase):
+    """
+    Unit test for courseware context_processor
+    """
+    def setUp(self):
+        super(UserPrefContextProcessorUnitTest, self).setUp()
+
+        self.user = UserFactory.create()
+        self.request = Mock()
+        self.request.user = self.user
+
+    def test_anonymous_user(self):
+        self.request.user = AnonymousUser()
+        context = user_timezone_locale_prefs(self.request)
+        self.assertIsNone(context['user_timezone'])
+        self.assertIsNone(context['user_language'])
+
+    def test_no_timezone_preference(self):
+        set_user_preference(self.user, 'pref-lang', 'en')
+        context = user_timezone_locale_prefs(self.request)
+        self.assertIsNone(context['user_timezone'])
+        self.assertIsNotNone(context['user_language'])
+        self.assertEqual(context['user_language'], 'en')
+
+    def test_no_language_preference(self):
+        set_user_preference(self.user, 'time_zone', 'Asia/Tokyo')
+        context = user_timezone_locale_prefs(self.request)
+        self.assertIsNone(context['user_language'])
+        self.assertIsNotNone(context['user_timezone'])
+        self.assertEqual(context['user_timezone'], 'Asia/Tokyo')

lms/djangoapps/courseware/tests/test_course_info.py

@@ -316,7 +316,7 @@ class SelfPacedCourseInfoTestCase(LoginEnrollmentTestCase, SharedModuleStoreTest
         self.assertEqual(resp.status_code, 200)
 
     def test_num_queries_instructor_paced(self):
-        self.fetch_course_info_with_queries(self.instructor_paced_course, 18, 4)
+        self.fetch_course_info_with_queries(self.instructor_paced_course, 21, 4)
 
     def test_num_queries_self_paced(self):
-        self.fetch_course_info_with_queries(self.self_paced_course, 18, 4)
+        self.fetch_course_info_with_queries(self.self_paced_course, 21, 4)

lms/djangoapps/courseware/tests/test_credit_requirements.py

@@ -14,7 +14,6 @@ from django.core.urlresolvers import reverse
 from xmodule.modulestore.tests.django_utils import SharedModuleStoreTestCase
 from xmodule.modulestore.tests.factories import CourseFactory
 from student.tests.factories import UserFactory, CourseEnrollmentFactory
-from util.date_utils import get_time_display, DEFAULT_SHORT_DATE_FORMAT
 
 from course_modes.models import CourseMode
 from openedx.core.djangoapps.credit import api as credit_api
@@ -122,7 +121,8 @@ class ProgressPageCreditRequirementsTest(SharedModuleStoreTestCase):
             response,
             "{}, you have met the requirements for credit in this course.".format(self.USER_FULL_NAME)
         )
-        self.assertContains(response, "Completed by {date}".format(date=self._now_formatted_date()))
+        self.assertContains(response, "Completed by {date}")
+        self.assertContains(response, datetime.datetime.now(UTC).strftime('%Y-%m-%d %H'))
         self.assertNotContains(response, "95%")
 
     def test_credit_requirements_not_eligible(self):
@@ -172,11 +172,3 @@ class ProgressPageCreditRequirementsTest(SharedModuleStoreTestCase):
         """Load the progress page for the course the user is enrolled in. """
         url = reverse("progress", kwargs={"course_id": unicode(self.course.id)})
         return self.client.get(url)
-
-    def _now_formatted_date(self):
-        """Retrieve the formatted current date. """
-        return get_time_display(
-            datetime.datetime.now(UTC),
-            DEFAULT_SHORT_DATE_FORMAT,
-            settings.TIME_ZONE
-        )

lms/djangoapps/courseware/tests/test_views.py

@@ -209,6 +209,7 @@ class ViewsTestCase(ModuleStoreTestCase):
             parent_location=self.chapter.location,
             due=datetime(2013, 9, 18, 11, 30, 00),
             display_name='Sequential 1',
+            format='Homework'
         )
         self.vertical = ItemFactory.create(
             category='vertical',
@@ -907,33 +908,22 @@ class ViewsTestCase(ModuleStoreTestCase):
         self.assertEqual(response.status_code, 200)
 
     def test_accordion(self):
-        request = RequestFactory().get('foo')
-        request.user = self.user
-        table_of_contents = toc_for_course(
-            request.user,
-            request,
-            self.course,
-            unicode(self.course.get_children()[0].scope_ids.usage_id),
-            None,
-            None
-        )
-
-        # removes newlines and whitespace from the returned view string
-        view = ''.join(render_accordion(request, self.course, table_of_contents['chapters'], 'en').split())
-        # the course id unicode is re-encoded here because the quote function does not accept unicode
+        """
+        This needs a response_context, which is not included in the render_accordion's main method
+        returning a render_to_string, so we will render via the courseware URL in order to include
+        the needed context
+        """
         course_id = quote(unicode(self.course.id).encode("utf-8"))
-
-        self.assertIn(
-            u'href="/courses/{}/courseware/Chapter_1/Sequential_1/"><pclass="accordion-display-name">Sequential1</p>'
-            .format(course_id.decode("utf-8")),
-            view
-        )
-
-        self.assertIn(
-            u'href="/courses/{}/courseware/Chapter_1/Sequential_2/"><pclass="accordion-display-name">Sequential2</p>'
-            .format(course_id.decode("utf-8")),
-            view
+        response = self.client.get(
+            reverse('courseware', args=[unicode(course_id)]),
+            follow=True
         )
+        test_responses = [
+            '<p class="accordion-display-name">Sequential 1 <span class="sr">current section</span></p>',
+            '<p class="accordion-display-name">Sequential 2 </p>'
+        ]
+        for test in test_responses:
+            self.assertContains(response, test)
 
 
 @attr(shard=1)
@@ -960,7 +950,8 @@ class BaseDueDateTests(ModuleStoreTestCase):
         section = ItemFactory.create(
             category='sequential',
             parent_location=chapter.location,
-            due=datetime(2013, 9, 18, 11, 30, 00)
+            due=datetime(2013, 9, 18, 11, 30, 00),
+            format='homework'
         )
         vertical = ItemFactory.create(category='vertical', parent_location=section.location)
         ItemFactory.create(category='problem', parent_location=vertical.location)
@@ -975,8 +966,7 @@ class BaseDueDateTests(ModuleStoreTestCase):
         self.user = UserFactory.create()
         self.assertTrue(self.client.login(username=self.user.username, password='test'))
 
-        self.time_with_tz = "due Sep 18, 2013 at 11:30 UTC"
-        self.time_without_tz = "due Sep 18, 2013 at 11:30"
+        self.time_with_tz = "2013-09-18 11:30:00+00:00"
 
     def test_backwards_compatability(self):
         # The test course being used has show_timezone = False in the policy file
@@ -985,8 +975,7 @@ class BaseDueDateTests(ModuleStoreTestCase):
         # remove the timezone.
         course = self.set_up_course(due_date_display_format=None, show_timezone=False)
         response = self.get_response(course)
-        self.assertContains(response, self.time_without_tz)
-        self.assertNotContains(response, self.time_with_tz)
+        self.assertContains(response, self.time_with_tz)
         # Test that show_timezone has been cleared (which means you get the default value of True).
         self.assertTrue(course.show_timezone)
 
@@ -1001,25 +990,11 @@ class BaseDueDateTests(ModuleStoreTestCase):
         response = self.get_response(course)
         self.assertContains(response, self.time_with_tz)
 
-    def test_format_plain_text(self):
-        # plain text due date
-        course = self.set_up_course(due_date_display_format="foobar")
-        response = self.get_response(course)
-        self.assertNotContains(response, self.time_with_tz)
-        self.assertContains(response, "due foobar")
-
     def test_format_date(self):
         # due date with no time
         course = self.set_up_course(due_date_display_format=u"%b %d %y")
         response = self.get_response(course)
-        self.assertNotContains(response, self.time_with_tz)
-        self.assertContains(response, "due Sep 18 13")
-
-    def test_format_hidden(self):
-        # hide due date completely
-        course = self.set_up_course(due_date_display_format=u"")
-        response = self.get_response(course)
-        self.assertNotContains(response, "due ")
+        self.assertContains(response, self.time_with_tz)
 
     def test_format_invalid(self):
         # improperly formatted due_date_display_format falls through to default
@@ -1049,7 +1024,10 @@ class TestAccordionDueDate(BaseDueDateTests):
 
     def get_response(self, course):
         """ Returns the HTML for the accordion """
-        return self.client.get(reverse('courseware', args=[unicode(course.id)]), follow=True)
+        return self.client.get(
+            reverse('courseware', args=[unicode(course.id)]),
+            follow=True
+        )
 
 
 @attr(shard=1)
@@ -1089,14 +1067,17 @@ class StartDateTests(ModuleStoreTestCase):
         course = self.set_up_course()
         response = self.get_about_response(course.id)
         # The start date is set in the set_up_course function above.
-        self.assertContains(response, "2013-SEPTEMBER-16")
+        # This should return in the format '%Y-%m-%dT%H:%M:%S%z'
+        self.assertContains(response, "2013-09-16T07:17:28+0000")
 
-    @patch('util.date_utils.pgettext', fake_pgettext(translations={
-        ("abbreviated month name", "Jul"): "JULY",
-    }))
-    @patch('util.date_utils.ugettext', fake_ugettext(translations={
-        "SHORT_DATE_FORMAT": "%Y-%b-%d",
-    }))
+    @patch(
+        'util.date_utils.pgettext',
+        fake_pgettext(translations={("abbreviated month name", "Jul"): "JULY", })
+    )
+    @patch(
+        'util.date_utils.ugettext',
+        fake_ugettext(translations={"SHORT_DATE_FORMAT": "%Y-%b-%d", })
+    )
     @unittest.skip
     def test_format_localized_in_xml_course(self):
         response = self.get_about_response(SlashSeparatedCourseKey('edX', 'toy', 'TT_2012_Fall'))
@@ -1345,17 +1326,17 @@ class ProgressPageTests(ModuleStoreTestCase):
         """Test that query counts remain the same for self-paced and instructor-paced courses."""
         SelfPacedConfiguration(enabled=self_paced_enabled).save()
         self.setup_course(self_paced=self_paced)
-        with self.assertNumQueries(35), check_mongo_calls(4):
+        with self.assertNumQueries(38), check_mongo_calls(4):
             self._get_progress_page()
 
     def test_progress_queries(self):
         self.setup_course()
-        with self.assertNumQueries(35), check_mongo_calls(4):
+        with self.assertNumQueries(38), check_mongo_calls(4):
             self._get_progress_page()
 
         # subsequent accesses to the progress page require fewer queries.
         for _ in range(2):
-            with self.assertNumQueries(21), check_mongo_calls(4):
+            with self.assertNumQueries(24), check_mongo_calls(4):
                 self._get_progress_page()
 
     @patch(

lms/djangoapps/courseware/views/index.py

@@ -24,7 +24,6 @@ import urllib
 
 from xblock.fragment import Fragment
 from opaque_keys.edx.keys import CourseKey
-from openedx.core.lib.time_zone_utils import get_user_time_zone
 from openedx.core.djangoapps.lang_pref import LANGUAGE_KEY
 from openedx.core.djangoapps.user_api.preferences.api import get_user_preference
 from shoppingcart.models import CourseRegistrationCode
@@ -402,7 +401,6 @@ class CoursewareIndex(View):
             self.request,
             self.course,
             table_of_contents['chapters'],
-            courseware_context['language_preference'],
         )
 
         # entrance exam data
@@ -499,7 +497,7 @@ class CoursewareIndex(View):
             raise
 
 
-def render_accordion(request, course, table_of_contents, language_preference):
+def render_accordion(request, course, table_of_contents):
     """
     Returns the HTML that renders the navigation for the given course.
     Expects the table_of_contents to have data on each chapter and section,
@@ -511,9 +509,6 @@ def render_accordion(request, course, table_of_contents, language_preference):
             ('course_id', unicode(course.id)),
             ('csrf', csrf(request)['csrf_token']),
             ('due_date_display_format', course.due_date_display_format),
-            ('time_zone', request.user.preferences.model.get_value(request.user, "time_zone", None)),
-            ('language', language_preference),
-
         ] + TEMPLATE_IMPORTS.items()
     )
     return render_to_string('courseware/accordion.html', context)

lms/envs/common.py

@@ -521,6 +521,9 @@ TEMPLATES = [
                 # Shoppingcart processor (detects if request.user has a cart)
                 'shoppingcart.context_processor.user_has_cart_context_processor',
 
+                # Timezone processor (sends language and time_zone preference)
+                'courseware.context_processor.user_timezone_locale_prefs',
+
                 # Allows the open edX footer to be leveraged in Django Templates.
                 'edxmako.shortcuts.footer_context_processor',
 

lms/static/js/dateutil_factory.js

@@ -36,8 +36,8 @@
                     context = {
                         datetime: $(this).data('datetime'),
                         timezone: $(this).data('timezone'),
-                        language: $(this).attr('lang'),
-                        format: $(this).data('format')
+                        language: $(this).data('language'),
+                        format: DateUtils.dateFormatEnum[$(this).data('format')]
                     };
                     displayDatetime = stringHandler(
                         localizedTime(context),
@@ -45,6 +45,11 @@
                         $(this).data('datetoken')
                     );
                     $(this).text(displayDatetime);
+                } else {
+                    displayDatetime = stringHandler(
+                        $(this).data('string')
+                    );
+                    $(this).text(displayDatetime);
                 }
             });
         };

lms/static/js/spec/dateutil_factory_spec.js

@@ -35,7 +35,7 @@ define(['../dateutil_factory.js'], function(DateUtilIterator) {
                     'data-string="Due {date}"></span>'
                 );
                 Object.keys(testLangs).forEach(function(key) {
-                    $form.attr('lang', String(key));
+                    $form.attr('data-language', String(key));
                     $(document.body).append($form);
 
                     DateUtilIterator.transform(iterationKey);

lms/static/js/student_account/views/account_settings_factory.js

@@ -116,9 +116,10 @@
                                 title: gettext('Time Zone'),
                                 valueAttribute: 'time_zone',
                                 helpMessage: gettext(
-                                    'Select the time zone for displaying course dates. If you do not specify a ' +
-                                    'time zone here, course dates, including assignment deadlines, are displayed in ' +
-                                    'Coordinated Universal Time (UTC).'
+                                    'Select the time zone for displaying course dates. ' +
+                                    'If you do not specify a time zone, course dates, ' +
+                                    'including assignment deadlines, will be displayed ' +
+                                    'in your browser\'s local time zone.'
                                 ),
                                 groupOptions: [{
                                     groupTitle: gettext('All Time Zones'),

lms/templates/course.html

@@ -19,14 +19,31 @@ from django.core.urlresolvers import reverse
         <span class="course-code">${course.display_number_with_default}</span>
         <span class="course-title">${course.display_name_with_default}</span>
       </h2>
-      <div class="course-date" aria-hidden="true">${_("Starts")}: ${course.start_datetime_text()}</div>
-    </div>
+        <%
+            if course.start is not None:
+                course_date_string = course.start.strftime('%Y-%m-%dT%H:%M:%S%z')
+            else:
+                course_date_string = ''
+        %>
+      % if isinstance(course_start_date, str):
+        <div class="course-date" aria-hidden="true">${_("Starts")}: ${course_start_date}</div>
+      % else:
+          <div class="course-date localized_datetime" aria-hidden="true" data-format="shortDate" data-datetime="${course_date_string}" data-string="${_("Starts: {date}")}"></div>
+      % endif
+      </div>
     <div class="sr">
       <ul>
       <li>${course.display_org_with_default}</li>
       <li>${course.display_number_with_default}</li>
-      <li>${_("Starts")}: <time itemprop="startDate" datetime="${course.start_datetime_text()}">${course.start_datetime_text()}</time></li>
-    </ul>
+      %if isinstance(course_start_date, str):
+          <li>${_("Starts")}: <time itemprop="startDate" datetime="${course_start_date}">${course_start_date}</time></li>
+      %else:
+          <li>${_("Starts")}: <time class="localized_datetime" itemprop="startDate" data-format="shortDate" data-datetime="${course_date_string}"></time></li>
+      %endif
+      </ul>
     </div>
   </a>
 </article>
+<%static:require_module_async module_name="js/dateutil_factory" class_name="DateUtilFactory">
+    DateUtilFactory.transform(iterationKey=".localized_datetime");
+</%static:require_module_async>

lms/templates/courseware/accordion.html

@@ -32,21 +32,19 @@ else:
                         span_start=HTML('<span class="sr">'),
                         span_end=HTML('</span>'),
                     ) if 'active' in section and section['active'] else ''}</p>
-                <%
-                if section.get('due') is None:
-                    due_date = ''
-                else:
-                    formatted_string = get_time_display(section['due'], due_date_display_format, coerce_tz=time_zone)
-                    due_date = '' if len(formatted_string)==0 else _('due {date}').format(date=formatted_string)
-                %>
 
-                ## There is behavior differences between
+                ## There are behavior differences between
                 ## rendering of sections which have proctoring/timed examinations
                 ## and those that do not.
                 ##
                 ## Proctoring exposes a exam status message field as well as
                 ## a status icon
-
+                <%
+                    if section.get('due') is None:
+                        data_string = ''
+                    else:
+                        data_string = _('due {date}')
+               %>
                 % if section['format'] or due_date or 'proctoring' in section:
                 <p class="subtitle">
                     % if 'proctoring' in section:
@@ -57,12 +55,12 @@ else:
                         ## completed proctored exam statuses should not show the due date
                         ## since the exam has already been submitted by the user
                         % if not section['proctoring'].get('in_completed_state', False):
-                            <span class="subtitle-name">${due_date}</span>
+                            <span class="localized-datetime subtitle-name" data-datetime="${section['due']}" data-string="${data_string}" data-timezone="${user_timezone}" data-language="${user_language}"></span>
                         % endif
                     % else:
                         ## non-proctored section, we just show the exam format and the due date
                         ## this is the standard case in edx-platform
-                        <span class="subtitle-name">${section['format']} ${due_date}</span>
+                        <span class="localized-datetime subtitle-name" data-datetime="${section['due']}" data-string="${data_string}" data-timezone="${user_timezone}" data-language="${user_language}"></span>
 
                         % if 'graded' in section and section['graded']:
                             <span class="menu-icon icon fa fa-pencil-square-o" aria-hidden="true"></span>
@@ -87,4 +85,8 @@ else:
     <%static:require_module_async module_name="js/courseware/accordion_events" class_name="AccordionEvents">
         AccordionEvents();
     </%static:require_module_async>
+
+<%static:require_module_async module_name="js/dateutil_factory" class_name="DateUtilFactory">
+    DateUtilFactory.transform(iterationKey=".localized-datetime");
+</%static:require_module_async>
 % endif

lms/templates/courseware/course_about.html

@@ -223,21 +223,40 @@ from openedx.core.lib.courses import course_image_url
         <ol class="important-dates">
           <li class="important-dates-item"><span class="icon fa fa-info-circle" aria-hidden="true"></span><p class="important-dates-item-title">${_("Course Number")}</p><span class="important-dates-item-text course-number">${course.display_number_with_default | h}</span></li>
           % if not course.start_date_is_still_default:
-            <li class="important-dates-item"><span class="icon fa fa-calendar" aria-hidden="true"></span><p class="important-dates-item-title">${_("Classes Start")}</p><span class="important-dates-item-text start-date">${course.start_datetime_text()}</span></li>
+              <%
+                  course_start_date = course.start
+              %>
+            <li class="important-dates-item">
+              <span class="icon fa fa-calendar" aria-hidden="true"></span>
+              <p class="important-dates-item-title">${_("Classes Start")}</p>
+              % if isinstance(course_start_date, str):
+                  <span class="important-dates-item-text start-date">${course_start_date}</span>
+              % else:
+                  <%
+                     course_date_string = course_start_date.strftime('%Y-%m-%dT%H:%M:%S%z')
+                  %>
+                  <span class="important-dates-item-text start-date localized_datetime" data-format="shortDate" data-datetime="${course_date_string}"></span>
+              % endif
+            </li>
           % endif
             ## We plan to ditch end_date (which is not stored in course metadata),
             ## but for backwards compatibility, show about/end_date blob if it exists.
             % if get_course_about_section(request, course, "end_date") or course.end:
+                <%
+                    course_end_date = course.end
+                %>
+
             <li class="important-dates-item">
                 <span class="icon fa fa-calendar" aria-hidden="true"></span>
                 <p class="important-dates-item-title">${_("Classes End")}</p>
-                <span class="important-dates-item-text final-date">
-                    % if get_course_about_section(request, course, "end_date"):
-                        ${get_course_about_section(request, course, "end_date")}
-                    % else:
-                        ${course.end_datetime_text()}
-                    % endif
-                </span>
+                  % if isinstance(course_end_date, str):
+                      <span class="important-dates-item-text final-date">${course_end_date}</span>
+                  % else:
+                    <%
+                        course_date_string = course_end_date.strftime('%Y-%m-%dT%H:%M:%S%z')
+                    %>
+                    <span class="important-dates-item-text final-date localized_datetime" data-format="shortDate" data-datetime="${course_date_string}"></span>
+                  % endif
             </li>
             % endif
 
@@ -323,3 +342,7 @@ from openedx.core.lib.courses import course_image_url
 %endif
 
 <%include file="../video_modal.html" />
+
+<%static:require_module_async module_name="js/dateutil_factory" class_name="DateUtilFactory">
+    DateUtilFactory.transform(iterationKey=".localized_datetime");
+</%static:require_module_async>

lms/templates/courseware/progress.html

@@ -6,7 +6,6 @@ from course_modes.models import CourseMode
 from certificates.models import CertificateStatuses
 from django.utils.translation import ugettext as _
 from django.core.urlresolvers import reverse
-from util.date_utils import get_time_display, DEFAULT_SHORT_DATE_FORMAT
 from django.conf import settings
 from django.utils.http import urlquote_plus
 %>
@@ -121,7 +120,7 @@ from django.utils.http import urlquote_plus
                                         <span>${_("Verification Declined" )}</span>
                                         %elif requirement['status'] == 'satisfied':
                                         <span class="fa fa-check" aria-hidden="true"></span>
-                                        <span>${_("Completed by")} ${get_time_display(requirement['status_date'], DEFAULT_SHORT_DATE_FORMAT, settings.TIME_ZONE)}</span>
+                                        <span class="localized-datetime" data-datetime="${requirement['status_date']}" data-string="${_('Completed by {date}')}" data-timezone="${user_timezone}" data-language="${user_language}"></span>
                                         %endif
                                     %else:
                                     <span class="not-achieve">${_("Upcoming")}</span>
@@ -168,11 +167,7 @@ from django.utils.http import urlquote_plus
                                         </h5>
                                         %if section.due is not None:
                                         <p>
-                                            <%
-                                            formatted_string = get_time_display(section.due, course.due_date_display_format, coerce_tz=settings.TIME_ZONE_DISPLAYED_FOR_DEADLINES)
-                                            due_date = '' if len(formatted_string)==0 else _(u'due {date}').format(date=formatted_string)
-                                            %>
-                                            <em>${due_date | h}</em>
+                                            <em class="localized-datetime" data-datetime="${section.due}" data-string="${_('due {date}')}" data-timezone="${user_timezone}" data-language="${user_language}"></em>
                                         </p>
                                         %endif
                                         %if len(section.scores) > 0:
@@ -197,3 +192,6 @@ from django.utils.http import urlquote_plus
         </div>
     </div>
 </main>
+<%static:require_module_async module_name="js/dateutil_factory" class_name="DateUtilFactory">
+    DateUtilFactory.transform(iterationKey=".localized-datetime");
+</%static:require_module_async>

lms/templates/dashboard/_dashboard_course_listing.html

@@ -10,7 +10,6 @@ from course_modes.models import CourseMode
 from course_modes.helpers import enrollment_mode_display
 from openedx.core.djangolib.js_utils import dump_js_escaped_json
 from openedx.core.djangolib.markup import HTML, Text
-from openedx.core.lib.time_zone_utils import get_user_time_zone
 from student.helpers import (
   VERIFY_STATUS_NEED_TO_VERIFY,
   VERIFY_STATUS_SUBMITTED,
@@ -99,20 +98,37 @@ from student.helpers import (
         <div class="course-info">
           <span class="info-university">${course_overview.display_org_with_default} - </span>
           <span class="info-course-id">${course_overview.display_number_with_default}</span>
-          <span class="info-date-block" data-tooltip="Hi">
-          <% time_zone = get_user_time_zone(user) %>
-          % if course_overview.has_ended():
-            ${_("Ended - {end_date}").format(end_date=course_overview.end_datetime_text("SHORT_DATE", time_zone))}
-          % elif course_overview.has_started():
-            ${_("Started - {start_date}").format(start_date=course_overview.start_datetime_text("SHORT_DATE", time_zone))}
-          % elif course_overview.start_date_is_still_default: # Course start date TBD
-            ${_("Coming Soon")}
-          % elif course_overview.starts_within(days=5):   # hasn't started yet
-            ${_("Starts - {start_date}").format(start_date=course_overview.start_datetime_text("DAY_AND_TIME", time_zone))}
-          % else:   # hasn't started yet
-            ${_("Starts - {start_date}").format(start_date=course_overview.start_datetime_text("SHORT_DATE", time_zone))}
-          % endif
-          </span>
+          <%
+            if course_overview.start_date_is_still_default:
+                container_string = _("Coming Soon")
+                course_date = None
+            else:
+                format = 'shortDate'
+                if course_overview.has_ended():
+                    container_string = _("Ended - {date}")
+                    course_date = course_overview.end
+                elif course_overview.has_started():
+                    container_string = _("Started - {date}")
+                    course_date = course_overview.start
+                elif course_overview.starts_within(days=5):
+                    container_string = _("Starts - {date}")
+                    course_date = course_overview.start
+                    format = 'defaultFormat'
+                else: ## hasn't started yet
+                    container_string = _("Starts - {date}")
+                    course_date = course_overview.start
+                endif
+            endif
+          %>
+
+                % if isinstance(course_date, str):
+                    <span class="info-date-block" data-tooltip="Hi">${_(container_string).format(date=course_date)}</span>
+                % elif course_date is not None:
+                    <%
+                        course_date_string = course_date.strftime('%Y-%m-%dT%H:%M:%S%z')
+                    %>
+                    <span class="info-date-block localized-datetime" data-language="${user_language}" data-tooltip="Hi" data-timezone="${user_timezone}" data-datetime="${course_date_string}" data-format=${format} data-string="${container_string}"></span>
+                % endif
         </div>
         <div class="wrapper-course-actions">
           <div class="course-actions">
@@ -439,3 +455,7 @@ from student.helpers import (
                }
            });
 </script>
+
+<%static:require_module_async module_name="js/dateutil_factory" class_name="DateUtilFactory">
+    DateUtilFactory.transform(iterationKey=".localized-datetime");
+</%static:require_module_async>

openedx/core/djangoapps/content/course_overviews/models.py

@@ -357,7 +357,6 @@ class CourseOverview(TimeStampedModel):
         """
         Returns True if the course starts with-in given number of days otherwise returns False.
         """
-
         return course_metadata_utils.course_starts_within(self.start, days)
 
     def start_datetime_text(self, format_string="SHORT_DATE", time_zone=utc):
@@ -389,6 +388,7 @@ class CourseOverview(TimeStampedModel):
     def end_datetime_text(self, format_string="SHORT_DATE", time_zone=utc):
         """
         Returns the end date or datetime for the course formatted as a string.
+
         """
         return course_metadata_utils.course_end_datetime_text(
             self.end,

openedx/core/lib/tests/test_time_zone_utils.py

 """Tests covering time zone utilities."""
 from freezegun import freeze_time
 from student.tests.factories import UserFactory
-from openedx.core.djangoapps.user_api.preferences.api import set_user_preference
 from openedx.core.lib.time_zone_utils import (
     get_display_time_zone,
     get_time_zone_abbr,
     get_time_zone_offset,
-    get_user_time_zone,
 )
 from pytz import timezone, utc
 from unittest import TestCase
@@ -25,20 +23,6 @@ class TestTimeZoneUtils(TestCase):
         self.user = UserFactory.build()
         self.user.save()
 
-    def test_get_user_time_zone(self):
-        """
-        Test to ensure get_user_time_zone() returns the correct time zone
-        or UTC if user has not specified time zone.
-        """
-        # User time zone should be UTC when no time zone has been chosen
-        user_tz = get_user_time_zone(self.user)
-        self.assertEqual(user_tz, utc)
-
-        # User time zone should change when user specifies time zone
-        set_user_preference(self.user, 'time_zone', 'Asia/Tokyo')
-        user_tz = get_user_time_zone(self.user)
-        self.assertEqual(user_tz, timezone('Asia/Tokyo'))
-
     def _display_time_zone_helper(self, time_zone_string):
         """
         Helper function to return all info from get_display_time_zone()

openedx/core/lib/time_zone_utils.py

@@ -2,19 +2,9 @@
 Utilities related to timezones
 """
 from datetime import datetime
-
 from pytz import common_timezones, timezone, utc
 
 
-def get_user_time_zone(user):
-    """
-    Returns pytz time zone object of the user's time zone if available or UTC time zone if unavailable
-    """
-    #TODO: exception for unknown timezones?
-    time_zone = user.preferences.model.get_value(user, "time_zone", 'utc')
-    return timezone(time_zone)
-
-
 def _format_time_zone_string(time_zone, date_time, format_string):
     """
     Returns a string, specified by format string, of the current date/time of the time zone.