Hi Fábio,
Thanks for reaching out!
While this does sound like a neat feature, it would unfortunately involve a customization that is a bit outside the scope of what we are able to provide here in the forums (please see our forum guidelines for more information). Could you please post it over in our Feature Ideas forum? This is what we use to gauge user interest in new features and help plan future development efforts.
If you’d like to give this customization a shot, our themer’s guide is the place to start. The JavaScript that generates that datepicker can be found at wp-content/plugins/the-events-calendar/common/vendor/jquery-timepicker/lib/bootstrap-datepicker.js, so I’d recommend taking a look at that as well. We also have a list of recommended developers if you’d like to get help with the code.
I’m sorry I don’t have a better answer for you here, but I hope this helps! Please let me know if you have any other questions.
Thanks,
Jennifer