0 the day on which an important event happened in a previous year -- 周年纪念；周年纪念日
We always celebrate our wedding anniversary with dinner in an expensive restaurant. 我们总是去豪华饭店就餐来庆祝我们的结婚纪念日。
Tomorrow is the 30th anniversary of the revolution. 明天是革命30周年纪念日。
We are planning a dinner to celebrate the 50th anniversary of the founding of the company.
Tomorrow's parade will mark the 50th anniversary of the battle.
On this anniversary of the tragedy we remember the living as well as the dead.
It would be a pity to have to wait for another anniversary to prompt further performances.
The five hundredth anniversary of his birth occurs this year.
As a related special event, the 20th anniversary of two-level morphology was celebrated.
