Date showed when i click on a day Fullcalendar

I’m working on a Fullcalendar project.

I was wondering if there was a way, when a click on a day to add an event, to show on the modal directly the date clicked.

This is my modal:

I’m gonna explain myself better: this modal appeared when I click on a day. What i was wondering: if i click on (for example) 14 of April, is it possible to load on the Inizio (it means start in italian) datetime-local input to automatically add 14/02/2022 and maybe also the hour (like 08:00)?