commemoration

noun

1. (countable, uncountable)The act of commemorating; an observance or celebration to honor the memory of some person or event.

   “commemoration ceremony”

   “in commemoration of”

   “annual commemoration”

   “A statue was built in commemoration of the event.”

   “The service was held in commemoration of fallen soldiers.”

2. (countable, uncountable)That which serves the purpose of commemorating; a memorial.
3. (countable, uncountable)The specification of individual saints in the prayers for the dead.
4. (UK, countable, uncountable)The great festival of the Oxford academic year, usually taking place on the third Wednesday after Trinity Sunday.