ember-django-adapter: posting date Date has wrong format. Use one of these formats instead: YYYY[-MM[-DD]]

When I save a model that has a JS date (created with new Date()) I get the error:

Date has wrong format. Use one of these formats instead: YYYY[-MM[-DD]]

The date in the post was 2015-01-05T22:08:37.838Z. So is this:

• a defect?
• something I should handle in the ember frontend, to format the date?
• something I should handle in the django api?

Appreciate any help.

Using: ember-cli 0.1.5 ember-data 1.0.0-beta.12 ember-django-adapter 0.5 django 1.7.1 djangorestframework 3.0.2 Python 3.4