noun
silver wedding anniversary; 25th wedding anniversary
Refers specifically to the celebration or ceremony marking 25 years of marriage.
両親の銀婚式に家族でお祝いをした。
We celebrated our parents' silver wedding anniversary as a family.
Compound of 銀 (gin, 'silver') + 婚 (kon, 'marriage') + 式 (shiki, 'ceremony'), following the Western tradition of naming wedding anniversaries after precious materials.