closing time; quitting time
Refers to the time when work or business operations end for the day. Commonly used in workplace and school contexts.
Quitting time is 5 p.m.
Only 30 minutes left until closing time.
始業時間 means 'starting time' (of work/school), the opposite of 終業時間.
定時 refers to the regular or scheduled time, often used for the official end of the workday (定時退社).
Compound of 終業 (しゅうぎょう, 'finishing work') and 時間 (じかん, 'time').