#2236: Is it Christmas?

XKCD comic, described below.
Transcript

No*

*99.73% accurate

[Caption below the panel:]

xkcd.com presents a new "Is It Christmas" service to compete with isitchristmas.com

(Sourced from explainxkcd.com)

We've tested it on 30 different days and it hasn't gotten one wrong yet.

ExplainOriginal