diff --git a/django/contrib/admin/static/admin/js/calendar.js b/django/contrib/admin/static/admin/js/calendar.js
index 1043dd61ef..75e7bce80c 100644
--- a/django/contrib/admin/static/admin/js/calendar.js
+++ b/django/contrib/admin/static/admin/js/calendar.js
@@ -1,4 +1,4 @@
-/*global gettext, get_format, quickElement, removeChildren*/
+/*global gettext, pgettext, get_format, quickElement, removeChildren*/
 /*
 calendar.js - Calendar functions by Adrian Holovaty
 depends on core.js for utility functions like removeChildren or quickElement
@@ -8,8 +8,29 @@ depends on core.js for utility functions like removeChildren or quickElement
     'use strict';
     // CalendarNamespace -- Provides a collection of HTML calendar-related helper functions
     var CalendarNamespace = {
-        monthsOfYear: gettext('January February March April May June July August September October November December').split(' '),
-        daysOfWeek: gettext('S M T W T F S').split(' '),
+        monthsOfYear: [
+            gettext('January'),
+            gettext('February'),
+            gettext('March'),
+            gettext('April'),
+            gettext('May'),
+            gettext('June'),
+            gettext('July'),
+            gettext('August'),
+            gettext('September'),
+            gettext('October'),
+            gettext('November'),
+            gettext('December')
+        ],
+        daysOfWeek: [
+            pgettext('one letter Sunday', 'S'),
+            pgettext('one letter Monday', 'M'),
+            pgettext('one letter Tuesday', 'T'),
+            pgettext('one letter Wednesday', 'W'),
+            pgettext('one letter Thursday', 'T'),
+            pgettext('one letter Friday', 'F'),
+            pgettext('one letter Saturday', 'S')
+        ],
         firstDayOfWeek: parseInt(get_format('FIRST_DAY_OF_WEEK')),
         isLeapYear: function(year) {
             return (((year % 4) === 0) && ((year % 100) !== 0 ) || ((year % 400) === 0));
diff --git a/tests/admin_widgets/tests.py b/tests/admin_widgets/tests.py
index d111c3ab7e..99b7b85afa 100644
--- a/tests/admin_widgets/tests.py
+++ b/tests/admin_widgets/tests.py
@@ -777,8 +777,8 @@ class DateTimePickerSeleniumFirefoxTests(SeleniumDataMixin, AdminSeleniumWebDriv
         # Enter test data
         member = models.Member.objects.create(name='Bob', birthdate=datetime(1984, 5, 15), gender='M')
 
-        # Get month names translations for every locales
-        month_string = 'January February March April May June July August September October November December'
+        # Get month name translations for every locale
+        month_string = 'May'
         path = os.path.join(os.path.dirname(import_module('django.contrib.admin').__file__), 'locale')
         for language_code, language_name in settings.LANGUAGES:
             try:
@@ -786,12 +786,12 @@ class DateTimePickerSeleniumFirefoxTests(SeleniumDataMixin, AdminSeleniumWebDriv
             except IOError:
                 continue
             if month_string in catalog._catalog:
-                month_names = catalog._catalog[month_string]
+                month_name = catalog._catalog[month_string]
             else:
-                month_names = month_string
+                month_name = month_string
 
             # Get the expected caption
-            may_translation = month_names.split(' ')[4]
+            may_translation = month_name
             expected_caption = '{0:s} {1:d}'.format(may_translation.upper(), 1984)
 
             # Test with every locale