英语翻译今天是这对夫妻的金婚纪念日,他们正举杯庆祝.（要求用定语从句）The couple is celebrating

英语翻译
今天是这对夫妻的金婚纪念日,他们正举杯庆祝.（要求用定语从句）
The couple is celebrating with a toast today which was their golden wedding anniversary.
The couple whose golden wedding anniversary is today is celebrating withe a toast .
请问我哪里不对了?老师说我的结构错误了,但我那也是定语从句啊……