I have the same problem as stefanB-2 on this topic
http://wp-types.com/forums/topic/cred-forms-is-handling-dates-not-correctly/
When I enter for example 01 feb. 2014 in a form buy using the popup calendar it is saved as Jan. 02, 2014.
i have the latest versions:
Cred (1.2.4)
Types (1.5.4)
WordPress 3.8.1
Please help me