GRAMMATICAL CATEGORY OF SCHOOL TIME
School time is a noun. A noun is a type of word the meaning of which determines reality.
What is school time?
1 : the time for beginning a session of school or during which school is held. 2 : the period of life spent in school or in study.
Is school day two words?
schooldays [plural] the period in your life when you go to school She hadn't seen Laura since her schooldays. Her schooldays had definitely not been the happiest days of her life.