Answer: anniversary

AnswerCrossword Clue
ANNIVERSARYTime to celebrate
ANNIVERSARYHusband-and-wife milestone
ANNIVERSARYType of party
anniversarythe annual recurrence of a date marking a notable event
anniversarydate that follows such an event by a specified period of time measured in units other than years the 6-month anniversary of the accident
anniversarythe annual recurrence of a date marking a notable event