Charter Day is a term that applies to the official celebration of the signing of a charter.
Charter Day may also refer to:
Charter Day (June 26) the annual celebration of the signing of the Charter of the United Nations Charter Day (North Borneo) (November 1) celebrating the signing of the Charter of North Borneo Cagayan de Oro Charter Day, a public holiday in the Philippines Charter Day School, a school in Leland, North Carolina