I have a field for the date of birth in the registration form. There should be a minimum age for each event, otherwise the booking may not be sent.
I thought of a custom-field in the event called “due date”, then you could check the date of birth >= the “due date” in the form. if the birthdate is smaller than the due date, the user should get an error-message when he presses the submit-button
how would that be possible?