Yes, this is indeed called Christmas Day, and was painted in about 1938 by the American artist Francis Criss (1901-1973). I hope your day was as enjoyable as hers seems to have been -- the house must have been nice and warm if she was able to wear so little with snow outside on the hills.
I see this was up for auction a few years ago with an estimate of between $800 and $1200. I wonder what it finally sold for.