May 20A public holiday commemorating the people's vote to establish a united Republic of Cameroon on May 20, 1972, this day is also known as Constitution Day . CONTACTS: Cameroon Embassy 2349 Massachusetts Ave. N.W. Washington, D.C. 20008 202-265-8790; fax: 202-387-3826 www.ambacam-usa.org SOURCES: AnnivHol-2000, p. 84