Mr hankey, thanks for clarifying, I was confused as you seemed to have got it working :)
Dani, I appreciate that dates need to be switched to correct format before submission; I expected this functionality to be built in.
Hopefully this will be added/addressed in an update, or your website updated to reflect that this product is for the US market only (without hand coding).
I do appreciate you taking the time to offer a workaround, thanks.
Dylan.