On Monday, December 26 Sweden traditionally hosts numerous matches of the sport, which is similar to land hockey played on an ice rink.
It's called "Annandagsbandy" in Swedish and it's a key day in the distinctly Swedish sport.
Torbjörn Andersson is a sports historian at Malmö University who is writing a book about bandy. He says the day represents the psychological start of the bandy season.
"The Boxing Day tradition started in the 1950s but it became more popular within the last 20 years," he tells Radio Sweden. "It's really part of a celebration of Swedish nature and the cold."
Andersson says another tradition is for fans to carry in a briefcase containing a thermos that's often filled with "glögg", Swedish mulled wine, or coffee spiked with snaps, a strong, flavored aquavit.