Art’s Birthday is an annual exchange-art event, first proposed in 1963 by French artist Robert Filliou, celebrated on January 17th by a loose collection of artists and artist organizations around the world.

World Day of the Snowman is celebrated on January 18, the date goes back to the form of the Snowman: “8” symbolizes the snowman and the “1” stands for his stick or broom and January is usually cold enough to build snowmen and is therefore a perfect chance to celebrate the snowman.

Opposite Day is a game usually played by children, one can declare that 25 January is Opposite Day (sometimes retroactively) to indicate something which will be said, or has just been said should be understood opposite to its original meaning (similar to the practice of crossed fingers to automatically nullify promises).

Sinds 1995 wordt Puzzeldag op 29 januari gevierd, deze dag komt uit de koker van diverse gamebedrijven uit de Verenigde Staten.

De poëzieweek is een themaweek die begint op de laatste donderdag van januari (= Gedichtendag), eindigt op de vrijdag acht dagen later en door de grootste Nederlands en Vlaamse poëzieorganisaties wordt georganiseerd.

Groundhog Day (bosmarmottendag) is een feestdag die in de Verenigde Staten en Canada elk jaar op 2 februari wordt gevierd.