For those of British extraction or who are part of the commonwealth, it is Boxing Day, a day originally when household servants had off and gifts were given to the less fortunate.*
Among African-Americans, especially in the Northeast, it's Kwanzaa.*
According to the sitcom Seinfeld, it's Festivus...for the rest of us, time for the airing of grievances and feats of strength.*
For me, after the massive baking blitz (40 dozen cookies, 4 funny cakes, a pound cake, and a baked pineapple), the traveling, and the return in snow, it was a day to cocoon in my favorite blanket by the fire as I alternated between watching movies, eating leftovers, and napping.
Hibernation Day it is.
*All facts have been unsubstantiated by even 10 seconds of a Google search because today I just can't be bothered with even that level of effort. Be glad you got a post at all....or not. It's up to you.