Redmine

Hi all,

I'm doing a migration from another bug tracking system (a custom system developed in my company) and I want to move to redmine.
I am trying to use the rest API with PHP ActiveResource as described in the following link:

http://www.redmine.org/projects/redmine/wiki/Rest_api_with_php

I was able to add an issue , but the date is always the current date.
Can I add an issue with a custom date , and if so what is the correct format (an example would be great)

Thanks