My bad, sorry I misunderstood what you did with this configuration.
Is this an input of a Smart Action Form?
If that’s so, the Date type is actually a full date.
You probably need to setup a Dateonly instead (cf. the input documentation: https://docs.forestadmin.com/documentation/reference-guide/actions/create-and-manage-smart-actions/use-a-smart-action-form#handling-input-values)