notice period
noun [ C ]
ukusthe period between the time that you are told about something and the time that it must happen or be done:
The senator's bill lengthens the notice period before a layoff to 90 days.
Legal eviction proceedings cannot begin until after the 60-day legal notice period is over.
HR
the period of time that an employee must work in their job after they have said that they are leaving, or after they have been asked to leave:
a notice period of two months