silver wedding (anniversary); 25th wedding anniversary
両親の銀婚式に食事会を開いた。
We held a dinner party for our parents' silver wedding anniversary.
銀婚式の記念にペアの指輪を贈った。
I gave matching rings as a gift for the silver anniversary.
結婚二十五年目の銀婚式を迎えた。
We reached the silver wedding anniversary of twenty-five years.