term time
US /ˈtɜːrm taɪm/
UK /ˈtɜːrm taɪm/

1.
período letivo, semestre
the period during which a university, college, or school is open and instruction is given
:
•
Students usually go home during the holidays, but stay at university during term time.
Os alunos geralmente vão para casa durante as férias, mas ficam na universidade durante o período letivo.
•
During term time, the library is open until midnight.
Durante o período letivo, a biblioteca fica aberta até meia-noite.