Action selected date field day and hours

[germanoalves]

Helo!

Is there any process I can do so that when using the date field in a form, if a date and time has already been chosen by a user, other users can no longer choose that date and time?

Thank you for your help!

 

[troester]

Is unique or php validation.
Or (if it's the old date element) in [Advanced] (PHP) Allow date function

 

[germanoalves]

Perfect! Thanks @troester