When I left from my regional to major, I remembered back to that 2008 disaster at UAL. A good friend got hosed by that. I made sure my employment went right up to the day I started my new job, and confirmed I could come back if something happened up to the day before. A couple classmates at the new job took multi week vacations before starting the new job, and had no backup if something did happen to them in between. I don’t want to be alarmist or anything, but I’m just saying, if you are nearing that point to transition to a new job, you might want to play it safe.