happy holiday from gmail

Gmail updated its homepage today with a heartwarming photo by Susanne Jespersen to wish “Happy holidays” to everyone (well, the page is shown to U.S. users only), along with a cryptic message (IMO):

There may be snow outside, but hopefully there snow spam in your inbox. May your inbox be filled with joy this holiday season and beyond.

“[S]now spam in your inbox.” What’s that mean? I don’t get it (unless Gmail really means to “snow spam” in my inbox).

UPDATE: LOL, I am so in the vacation mood. I should have read that aloud. Thanks to everyone in the comment for pointing it out! :)