Original Message

Easiest thing is to just ask if other pilots want to swap. If that doesn't work, put in your PTO request early and if the company can't fill the shift then it's on them. It isn't going to break your base to be OOS for a day. 

Fwiw there are a handful of people who are willing to work the holidays where I'm at (I'm one of them) and I've learned that sweetening the pot with something as small as a 6 pack or a growler of their favorite brew goes a long way. Your milage may vary. Good luck!