datepicker stopped working after updates

having similar issue with trying to make it work.
Just leave a blank field with no date picker

yes, same here with wp4.5.3 and cf 4.4.2 and datepicker 2.5.2 it seems that the plugin is no longer maintained from the github page https://github.com/relu/contact-form-7-datepicker/

we need to find another way

Not working for me either with :

WP – 4.5.3
CF7 – 4.5
Datepicker – 2.5.2

Any ideas anyone?

$(...).datetimepicker is not a function