Как по Английски будет jubileum

noun

The date on which an event took place or an institution was founded in a previous year.

Примеры использования:

The 50th anniversary of the battle of britain

The date on which an event occurred in some previous year

noun

A special anniversary of an event, especially one celebrating twenty-five or fifty years of a reign or activity.

Примеры использования:

To celebrate its jubilee, the club is holding a tournament