Add a DATE add-on custom field

[Valentina R]

A customer needs to add a date input field with add-ons. He needs a date picker.

Could this be implemented in core? Or is there some code snippet he can use to implement it?

Requested here: https://bookingwp.com/forums/topic/we-need-by-add-ons-an-group-an-field-type-date-or-an-custom-input-text-only/

[Željan Topić]

Added with 4.19.0