今天是您的寿诞之辰。

Today is your birthday.

今天是奶奶的80寿诞，全家人聚在一起给奶奶祝寿。

Today is grandma's 80th birthday, and all the family have got together to congratulate her.

他的传记特别安排在他的70寿诞庆典时出版。

Publication of his biography was timed to coincide with his 70th birthday celebrations.