May Day on May 1 is an ancient northern hemisphere spring festival and usually a public holiday; it is also a traditional spring holiday in many cultures. Dances, singing, and cake are usually part of the celebrations that the day includes.

May-day (1831 – 30 May 1834) was a British Thoroughbred racehorse who won the classic 1000 Guineas at Newmarket Racecourse in 1834. On her only subsequent start she was fatally injured in the Oaks Stakes at Epsom