Mary Henry Day (January 25, 1910 – July 11, 2006) was an American ballet teacher and arts administrator.
Mary Henry Day was born on January 25, 1910, in Washington, D.C., and grew up in Foggy Bottom.
After she graduated, she returned to Washington and taught private dance lessons and choreographed children's ballets at local high schools.
[3] In 1997 she announced she would retire from the ballet, officially ending her tenure at the company in 1999, continuing to serve as director of the school until 2004.
[5] Pupils of the school during Day's tenure included Shirley MacLaine and Georgia Engel.