This is a fun one by Dylan Moriarty for the Washington Post. Punch in your city to see the percentage of Christmas days (or Hanukkah, New Year’s Eve, or Winter Solstice) since 1940 when it snowed. It’s nice and corny like it should be, with holiday illustrations and snow falling on the screen. There’s even a data postcard that you can download and share with all your friends and family, because th