NYC high school application deadline is Monday Updated Mar 01, 2021; Posted Mar 01, 2021 The deadline to apply to a New York City high school is Monday, March 1. (Staten Island Advance/ Jan Somma-Hammel) Facebook Share STATEN ISLAND, N.Y. — The New York City high school application deadline for the 2021-2022 school year is Monday. To apply for high school, your child must be a current New York City resident (this includes students who have temporarily moved out of New York City during the COVID-19 pandemic), a current eighth-grade student, or a first-time ninth-grade student. All New York City children are guaranteed a seat at a public middle school.