Before marking as duplicate, since I can see many others have had this problem, I am using 6.x-1.1, which I can't see anybody else having issues with.
I've tried all the solutions I can seem to fish out of other issues such as switching to Select List widget and formatting to various formats and specifying custom date formats.
Strangely I was able to import all the nodes once, however none of the dates imported, strange because Date From is a required field. In that instance I was using Popup Date and MM/DD/YYYY.
Thanks for any advice :)