Works great, perfect support

I did change the date manually after a while of investigating. It worked. Also when I changed the date format in WordPress (to an american version), the date picker worked as expected.

Please fix this bug as it is quite annoying.
Cheers.

I will gladly change my rating at the very moment you fix the bug.

The date picker now works fine, however it doesn’t show my custom date format in the input field (as you stated). But this doesn’t bother me that much.

Thanks for the quick fix!