anniversary
an·ni·ver·sa·ry
/ˌænəˈvɚsəri/ noun , pl -ries [ count ]
: a date that is remembered or celebrated because a special or notable event occurred on that date in a previous year
the anniversary of the invasion/attack
We are celebrating our fifth (wedding) anniversary this year. = We are celebrating the fifth anniversary of our wedding this year.
The exhibit will close on the 100th anniversary of the artist's death.
— often used before another noun
an anniversary party/celebration/dinner
