Datetime-button in a form, how to start with empty value?

I’m trying to have a form with a date.
Initially, the date is empty, but the picker date is the min date value.

I want to start without a selected date so the user must select one.
Is there any easy way to do it?

I tried to replace the date slot with “Select a date” text if “form. Date === undefined” but I still have the time slot there.
If I “presentation” prop to “date”, I see only the date button, but it’s stays that way and doesn’t change even if I change presentation value.