British Museum # May is named after the Greek goddess Maia, seen here with flower garlands in this print by Jacobus Harrewyn. The zodiac symbol for Gemini – twins – can be seen in the background http://ow.ly/8Ir030bfL8M International Workers' Day or Labour Day ( International ), and its related observances: Earliest day on which Labour Day can fall, while May 7 is the latest; celebrated on the first Monday of May. ( Barbados , Dominica ) Law Day (United States) , formerly intended to counterbalance the celebration of Labour Day . (United States) Loyalty Day , formerly intended to counterbalance the celebration of Labour Day . (United States) May Day (beginning of Summer) observances in the Northern hemisphere (see April 30 ) : 出生 Joseph Heller was born in Brooklyn, New York on this day in 1923. "The enemy is anybody who's going to get you killed, no matter which side he's on." --from CATCH-22 (1961)