diff --git a/wagtail/wagtailadmin/static/wagtailadmin/js/page-editor.js b/wagtail/wagtailadmin/static/wagtailadmin/js/page-editor.js
index 4f53792b9..448d4c052 100644
--- a/wagtail/wagtailadmin/static/wagtailadmin/js/page-editor.js
+++ b/wagtail/wagtailadmin/static/wagtailadmin/js/page-editor.js
@@ -104,7 +104,7 @@ function initDateTimeChooser(id) {
     if (window.dateTimePickerTranslations) {
         $('#' + id).datetimepicker({
             closeOnDateSelect: true,
-            format: 'Y-m-d H:i:s',
+            format: 'Y-m-d H:i',
             scrollInput:false,
             i18n: {
                 lang: window.dateTimePickerTranslations
@@ -113,7 +113,7 @@ function initDateTimeChooser(id) {
         });
     } else {
         $('#' + id).datetimepicker({
-            format: 'Y-m-d H:i:s',
+            format: 'Y-m-d H:i',
         });
     }
 }
diff --git a/wagtail/wagtailadmin/widgets.py b/wagtail/wagtailadmin/widgets.py
index 6a2f146b4..19c35a7e0 100644
--- a/wagtail/wagtailadmin/widgets.py
+++ b/wagtail/wagtailadmin/widgets.py
@@ -28,16 +28,28 @@ class AdminAutoHeightTextInput(WidgetWithScript, widgets.Textarea):
         return '$("#{0}").autosize();'.format(id_)
 
 class AdminDateInput(WidgetWithScript, widgets.DateInput):
+    # Set a default date format to match the one that our JS date picker expects -
+    # it can still be overridden explicitly, but this way it won't be affected by
+    # the DATE_INPUT_FORMATS setting
+    def __init__(self, attrs=None, format='%Y-%m-%d'):
+        super(AdminDateInput, self).__init__(attrs=attrs, format=format)
+
     def render_js_init(self, id_, name, value):
         return 'initDateChooser({0});'.format(json.dumps(id_))
 
 
 class AdminTimeInput(WidgetWithScript, widgets.TimeInput):
+    def __init__(self, attrs=None, format='%H:%M'):
+        super(AdminTimeInput, self).__init__(attrs=attrs, format=format)
+
     def render_js_init(self, id_, name, value):
         return 'initTimeChooser({0});'.format(json.dumps(id_))
 
 
 class AdminDateTimeInput(WidgetWithScript, widgets.DateTimeInput):
+    def __init__(self, attrs=None, format='%Y-%m-%d %H:%M'):
+        super(AdminDateTimeInput, self).__init__(attrs=attrs, format=format)
+
     def render_js_init(self, id_, name, value):
         return 'initDateTimeChooser({0});'.format(json.dumps(id_))
 
diff --git a/wagtail/wagtailcore/migrations/0011_update_golive_expire_help_text.py b/wagtail/wagtailcore/migrations/0011_update_golive_expire_help_text.py
new file mode 100644
index 000000000..b16ed85f1
--- /dev/null
+++ b/wagtail/wagtailcore/migrations/0011_update_golive_expire_help_text.py
@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('wagtailcore', '0010_change_page_owner_to_null_on_delete'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='page',
+            name='expire_at',
+            field=models.DateTimeField(help_text='Please add a date-time in the form YYYY-MM-DD hh:mm.', null=True, verbose_name='Expiry date/time', blank=True),
+            preserve_default=True,
+        ),
+        migrations.AlterField(
+            model_name='page',
+            name='go_live_at',
+            field=models.DateTimeField(help_text='Please add a date-time in the form YYYY-MM-DD hh:mm.', null=True, verbose_name='Go live date/time', blank=True),
+            preserve_default=True,
+        ),
+    ]
diff --git a/wagtail/wagtailcore/models.py b/wagtail/wagtailcore/models.py
index a761be828..7889a5b57 100644
--- a/wagtail/wagtailcore/models.py
+++ b/wagtail/wagtailcore/models.py
@@ -278,8 +278,8 @@ class Page(six.with_metaclass(PageBase, MP_Node, ClusterableModel, index.Indexed
     show_in_menus = models.BooleanField(default=False, help_text=_("Whether a link to this page will appear in automatically generated menus"))
     search_description = models.TextField(blank=True)
 
-    go_live_at = models.DateTimeField(verbose_name=_("Go live date/time"), help_text=_("Please add a date-time in the form YYYY-MM-DD hh:mm:ss."), blank=True, null=True)
-    expire_at = models.DateTimeField(verbose_name=_("Expiry date/time"), help_text=_("Please add a date-time in the form YYYY-MM-DD hh:mm:ss."), blank=True, null=True)
+    go_live_at = models.DateTimeField(verbose_name=_("Go live date/time"), help_text=_("Please add a date-time in the form YYYY-MM-DD hh:mm."), blank=True, null=True)
+    expire_at = models.DateTimeField(verbose_name=_("Expiry date/time"), help_text=_("Please add a date-time in the form YYYY-MM-DD hh:mm."), blank=True, null=True)
     expired = models.BooleanField(default=False, editable=False)
 
     locked = models.BooleanField(default=False, editable=False)