The day he was born.
the answer unknown. in HSM 1 and 2, they never mentioned it. maybe they'll mention it in HSM 3... =D however, Zac Efron, who plays Troy Bolton in HSM, was born on October 18th, 1987.
Troy is the name of a place. Trojan refers to a person or thing from Troy. Homer wrote about the Trojan War.
Paris
Helen, Queen of Sparta was Menelaus's wife, and taken to Troy and made the lover of Paris a prince of Troy.
Sparta is the birth place of Helen of Troy. The mythical war because of abduction of Helen led to destruction of Troy.
The Gentrys ended in 1974.
The Gentrys was created in 1963.
Troy Bienemann was born on February 18, 1983.
Troy Wilson was born on January 19, 1972.
Troy Donahue was born on January 27, 1936.
Doris Troy was born on January 6, 1937.
Troy Vincent was born on June 8, 1970.
Troy Polamalu was born on April 19, 1981.
Troy Hudson was born on March 13, 1976.
Troy Sanders was born on September 8, 1973.
Troy Garity was born on July 7, 1973.
Troy Perkins was born on July 29, 1981.