we have a problem since 1-2 month with the events-manager.
An user can not post an event at the calender.
When all fields are filled correct (date with the datepicker) after the click on submit he gets the Error: Dates must have correct formatting.
You can try it by yourself at http://feierei.de/event-eintragen/?action=edit
I've updated the plugin to the latest version today and do not any changes to the design or code, but the error is still there.
I've deactivated other plugins to test, but the error still appears.
Where is the problem?