I saw and tried it on Am irite.
Egg nog liqueur has various versions in several European countries, namely the Dutch specialty
https://en.wikipedia.org/wiki/Advocaat
and eggnog (with or without alcohol), is more an American and Canadian (and partly South American) tradition:
https://en.wikipedia.org/wiki/Eggnog
I had a few occasions to taste it, but in most cases as an ingredient of certain special dishes and/or drinks.
One of the alcohol based Christmas "traditions" on our side of the Big Pond is the widespread mulled wine:
https://en.wikipedia.org/wiki/Mulled_wine
Well Rooster maybe ima put it on my holiday list, here! I only take about one drink per year, but I love alcohol (especially the pretty bottles) so I already have enough to last for prolly about a century...