纪念日用英语怎么说缩写

"Anniversary" is the English word for "纪念日". It is a noun that refers to a date that is an annual celebration or observance of a past event. The word comes from the Latin "annus" meaning "year" and "versus" meaning "turn" or "return".

Here are some example sentences using the word "anniversary" in English:

Today is our wedding anniversary. (今天是我们的结婚纪念日。)
We are going to celebrate the anniversary of our company's founding next month. (我们下个月要庆祝公司成立纪念日。)
The 50th anniversary of the moon landing was a significant event in history. (登月50周年纪念日是历史上一个重要事件。)

There is no common abbreviation for "anniversary" in English. If you need to abbreviate the word, you could use "anniv." or "annivrsry", but these abbreviations are not widely used.