五ご十じゅう年ねん祭さい

noun

jubilee; semicentennial; 50th anniversary celebration

Refers to a celebration or ceremony marking the 50th year of an event, institution, or reign. Often used in formal or historical contexts.

• 今年ことしは市し制せい施し行こう五ご十じゅう年ねん祭さいが開ひらかれる。

  This year, the city's 50th anniversary celebration will be held.

• 五ご十じゅう年ねん祭さいの記き念ねん式しき典てんに出しゅっ席せきした。

  I attended the commemorative ceremony for the 50th anniversary.