The Collaborative International Dictionary
Anniversary week
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.]