noun
bronze wedding; 7th wedding anniversary
Refers specifically to the 7th wedding anniversary, following the traditional anniversary naming convention.
両親は今年で結婚7年目、銅婚式を迎えた。
My parents celebrated their bronze wedding anniversary this year, marking seven years of marriage.
Compound of 銅 (どう, 'copper, bronze'), 婚 (こん, 'marriage'), and 式 (しき, 'ceremony'), following the Western tradition of naming wedding anniversaries after materials.