Possibility to have nullable datepicker?

I have a 'Date of Death' field that should be nullable. Currently, the DatePicker defaults to the current date, and users have to clear it every time before saving. Is there a way to modify this behavior?

Solution

Ok, got it. It's older project and I'm using carbon mutator, when it gets "null" value to parse, it will return current date, that's what I see on edit page. Thanks for pointing me to right way.