anniversary - the date on which an event occurred in some previous year (or the celebration of it)day - a day assigned to a particular purpose or observance; "Mother's Day" birthday - an anniversary of the day on which a person was born (or the celebration of it) jubilee - a special anniversary (or the celebration of it) wedding anniversary - the anniversary of the day on which you were married (or the celebration of it) millennium - the 1000th anniversary (or the celebration of it) |