commemoration

commemoration is a Noun

Definition:

[1] The act of commemorating; an observance or celebration designed to honor the memory of some person or event. This sacrament was designed to be a standing commemoration of the death and passion of our Lord. Abp. Tillotson. The commonwealth which . . . chooses the most flagrant act of murderous regicide treason for a feast of eternal commemoration. Burke.

[2] Whatever serves the purpose of commemorating; a memorial. Commemoration day, at the University of Oxford, Eng., an annual observance or ceremony in honor of the benefactors of the University, at which time honorary degrees are conferred.