Smarch (with a white background)

In one of the Halloween episodes of The Simpsons, Marge tells her children what happened on the 13th hour of the 13th day of the 13th month.

Thirteenth month?

Yes, well, you see, there was a misprint on the calendars in Springfield that year. The 13th month turns out to be known as Smarch.

Homer notes how cold Smarch is.

See also:
https://www.cafepress.com/smarch2