She can be as unconventional as she wants. Unfortunately for her, this is a very conventional US election with set in stone deadlines and rules.
It doesn’t matter anyway. She announced already on Constitution Day. At least that is what everyone swore was when she would announce last I heard. I haven seen a paper lately so I don’t know.
The new date is St Isidore of Seville Day. It IS April 4, but that doesn't matter if one is a True Believer.