How to cleared the date picker?

Hello,

Problem essence:
A date picker consists of two “inputs”, the visible - in which we set the date and the invisible - which stores the value. If you set the date picker in the form, the visible “input” will be cleared when the form is reset, but the “input” storing the values will not be cleared. How can I clear the invisible “input” in which the values of the picker date are stored?

Thanks in advance!