'Knut's Day'), or the Feast of Saint Knut, is a traditional festival celebrated in Sweden and Finland on 13 January.

In Sweden, the feast held during this event is called a Knut's party (julgransplundring, literally 'Christmas tree plundering').

[9] On nuutinpäivä, a tradition has been observed which is somewhat analogous to the modern Santa Claus, where young men dressed as goats (Finnish: nuuttipukki) would visit houses.

Usually the dress was an inverted fur jacket, a leather or birch bark mask, horns, sometimes with a sauna whisk as a tail.

[11] A dialectical proverb from Noormarkku says: Hyvä Tuomas joulun tua, paha Knuuti poijes viä or 'Good [St.] Thomas brings Christmas, evil Knut takes [it] away.