Comment 3 for bug 1331427

1. Log in as admin
2. Go to Resource Usage
3. In the "Period" dropdown, choose "Other"

Hope this helps!

On the front-end side, ideally these forms should call the generic datepicker code that is used in other parts of Horizon (like e.g. the datepicker).

https://github.com/openstack/horizon/blob/2b2015a345/horizon/static/horizon/js/horizon.forms.js#L59