jubilee
Refers to a special anniversary, especially a 25th, 50th, or 60th celebration, often used for monarchs or institutions.
エリザベス女王のダイヤモンド・ジュビリーは2012年に祝われた。
Queen Elizabeth's Diamond Jubilee was celebrated in 2012.
The people celebrated the queen's jubilee.
会社は創立五十周年のジュビリーを開いた。
The company held a jubilee to mark its 50th founding anniversary.