diff --git a/wagtail/wagtailcore/migrations/0009_remove_auto_now_add_from_pagerevision_created_at.py b/wagtail/wagtailcore/migrations/0009_remove_auto_now_add_from_pagerevision_created_at.py
new file mode 100644
index 000000000..3dbd7e409
--- /dev/null
+++ b/wagtail/wagtailcore/migrations/0009_remove_auto_now_add_from_pagerevision_created_at.py
@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('wagtailcore', '0008_populate_latest_revision_created_at'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='pagerevision',
+            name='created_at',
+            field=models.DateTimeField(),
+        ),
+    ]
diff --git a/wagtail/wagtailcore/models.py b/wagtail/wagtailcore/models.py
index 5db4e42af..7b201c352 100644
--- a/wagtail/wagtailcore/models.py
+++ b/wagtail/wagtailcore/models.py
@@ -946,7 +946,7 @@ class SubmittedRevisionsManager(models.Manager):
 class PageRevision(models.Model):
     page = models.ForeignKey('Page', related_name='revisions')
     submitted_for_moderation = models.BooleanField(default=False)
-    created_at = models.DateTimeField(auto_now_add=True)
+    created_at = models.DateTimeField()
     user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, blank=True)
     content_json = models.TextField()
     approved_go_live_at = models.DateTimeField(null=True, blank=True)
@@ -955,6 +955,12 @@ class PageRevision(models.Model):
     submitted_revisions = SubmittedRevisionsManager()
 
     def save(self, *args, **kwargs):
+        # Set default value for created_at to now
+        # We cannot use auto_now_add as that will override
+        # any value that is set before saving
+        if self.created_at is None:
+            self.created_at = timezone.now()
+
         super(PageRevision, self).save(*args, **kwargs)
         if self.submitted_for_moderation:
             # ensure that all other revisions of this page have the 'submitted for moderation' flag unset
diff --git a/wagtail/wagtailcore/tests/test_page_model.py b/wagtail/wagtailcore/tests/test_page_model.py
index 804b2c4e1..b54b22b4a 100644
--- a/wagtail/wagtailcore/tests/test_page_model.py
+++ b/wagtail/wagtailcore/tests/test_page_model.py
@@ -443,6 +443,23 @@ class TestCopyPage(TestCase):
         # Check that the new revision is not submitted for moderation
         self.assertFalse(new_christmas_event.revisions.first().submitted_for_moderation)
 
+    def test_copy_page_copies_revisions_and_doesnt_change_created_at(self):
+        christmas_event = EventPage.objects.get(url_path='/home/events/christmas/')
+        christmas_event.save_revision(submitted_for_moderation=True)
+
+        # Set the created_at of the revision to a time in the past
+        revision = christmas_event.get_latest_revision()
+        revision.created_at = datetime.datetime(2014, 1, 1)
+        revision.save()
+
+        # Copy it
+        new_christmas_event = christmas_event.copy(update_attrs={'title': "New christmas event", 'slug': 'new-christmas-event'})
+
+        # Check that the created_at time is the same
+        christmas_event_created_at = christmas_event.get_latest_revision().created_at
+        new_christmas_event_created_at = new_christmas_event.get_latest_revision().created_at
+        self.assertEqual(christmas_event_created_at, new_christmas_event_created_at)
+
     def test_copy_page_copies_revisions_and_doesnt_schedule(self):
         christmas_event = EventPage.objects.get(url_path='/home/events/christmas/')
         christmas_event.save_revision(approved_go_live_at=datetime.datetime(2014, 9, 16, 9, 12, 00, tzinfo=pytz.utc))