Jubilee

禧年

xǐnián

((Jewish history) special year of emancipation supposed to be observed every fifty years)

禧年

xǐnián

((Roman Catholicism) special year in which plenary indulgences and remission from sin can be granted upon making a pilgrimage)

紀念日 /纪念日

jìniànrì

(major anniversary of an event, particularly the 50th anniversary of a coronation or marriage)

聖年 /圣年

shèngnián

((Jewish history) special year of emancipation supposed to be observed every fifty years)