Since 1920, the brave, the foolhardy and the crazy indulge in a January 1 ritual, the Polar Bear Dip. 

The event began in Vancouver and has since spread across Canada, the US, Netherlands, Greenland, New Zealand, UK, South Korea and the Antarctic. The bravest get into swimsuits, break the ice and take a plunge into the freezing waters. Some locations indulge later in the year, but rationally, it takes place on January 1.  
New Year’s Day Polar Bear Dips in Canada – 2025

Since I am neither brave nor foolhardy and not quite crazy enough, I’ll stay inside where it’s warm and admire 2 of my favourite polar bear stamps.

Polar Bear
Part of the Old Banknotes 2018 series
Released by Greenland in 2018

Polar Bear (Ursus maritimus)
Part of the Canadian Fauna definitives
Designers: Alain Leduc, Steven Slipp
Engraver: Martin Mörck