Here is the part no one tells you. If you do find an open store, be incredibly nice. The person behind the counter is missing their own holiday for you.
Are Grocery Stores Open on Christmas Day?
Smile. Say “thank you” like you mean it. Tip the pizza driver double. They are your unsung heroes.
I once saw a man at a gas station on Christmas morning buy coffee for everyone in line. It was a $3 gesture that turned strangers into a little community.