n. 周年纪念

[ noun ]
the date on which an event occurred in some previous year (or the celebration of it)
<noun.time>

Anniversary \An`ni*ver"sa*ry\, n.; pl. {Anniversaries}. [Cf. F.
anniversaire.]
1. The annual return of the day on which any notable event
took place, or is wont to be celebrated; as, the
anniversary of the Declaration of Independence.

2. (R. C. Ch.) The day on which Mass is said yearly for the
soul of a deceased person; the commemoration of some
sacred event, as the dedication of a church or the
consecration of a pope.

3. The celebration which takes place on an anniversary day.
--Dryden.


Anniversary \An`ni*ver"sa*ry\, a. [L. anniversarius; annus year
+ vertere, versum, to turn: cf. F. anniversaire.]
Returning with the year, at a stated time; annual; yearly;
as, an anniversary feast.

{Anniversary day} (R. C. Ch.). See {Anniversary}, n., 2.

{Anniversary week}, that week in the year in which the annual
meetings of religious and benevolent societies are held in
Boston and New York. [Eastern U. S.]