The fundamental combination of November and December, that's 61 days, because people start putting Christmas decorations and stuff on November 1st. It's the holiday month I guess.
November 1st:

Person 1: Hey! It's November now.

Person 2: Nah it's Nocember or Devember.

Person 1: Huh?

Person 2: Combination of November and December.

Person 1: Oh, well happy Nocember/Devember I guess.
by SnowyBoardingFish December 5, 2021
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