shift change; change of shifts
Refers to the act of changing shifts or the time when one shift ends and another begins, typically in workplaces like factories, hospitals, or offices.
The shift change time is 3 p.m.
交代勤務 refers to the system of working in shifts, while 勤務交代 is the actual changeover between shifts.
Compound of 勤務 (duty, work) and 交代 (alternation, change).