I think the annual World Cup
There are no Euros in Ice hockey nor qualifications for World/Euros like in other sports. But if you look at international calendars of soccer, for example, you can see there is one big tourney every year (plus qualifications in "spare" time). In 2024. you had Euros, this spring/summer Nations League, next World Cup and after that again Nations League. If I calculated right only basketball has "year off" in 4-years cycle.