Today is the day after Christmas and, because Christmas falls on a Sunday this year, Monday is a day off work for many of us in the States. Hooray!
But across the pond, the day after Christmas — or more accurately, the weekday after Christmas — is always an actual holiday. It's call Boxing Day and it has nothing to do with pugilism (or the "unboxing" phenomenon, which I admit to not understanding one bit).
What Is Boxing Day? How to Celebrate This Perfectly Sensible British Holiday — New Holiday Traditions