There... should be seasonal themed fics in the works AS SOON AS I AM DONE WITH THE SECRET SANTA FIC. Which I am not freaking over. No no no, not at all. /is a bad liar

I sort of don't have headcanon on this, but I think Clint and Tasha are mostly adaptable and go along with whatever they're tasked to do on Christmas. Sometimes they're separated because of the missions and I have this imagery where he's sitting on a cold roof, spying someone/protecting someone (but not to shoot, because still - Christmas Eve!) and she is in the other (warmer) part of the world, in some classy party, all dressed up and at the midnight (his time) his cell phone buzzes. And they talk a little. At the end she tells him "Happy Christmas" or something and they don't make big deal out of it, except Clint's got a big smile on his face and suddenly it's not so cold any more.