They are closed on Christmas Day but open on Christmas Eve.
Most locations will be closed Thanksgiving and Christmas. There may be a few exceptions so you would need to contact the location directly to find out their holiday schedule.
Only pdx open on Xmas are the airport locations
I doubt they are open Christmas Day.
Eve
Yes Pappadeaux is open on Christmas eve but I am not sure about Christmas
Thanks! Your answer is awaiting moderation.