RACF® allows you to limit the use of specific terminals to certain days of the week and certain hours of the day. To control when the system can be accessed from the terminal, use the WHEN operand on the RDEFINE and RALTER commands for the TERMINAL or GTERMINL classes. For more information on the time and day-of-week controls, see Limiting when a user can access the system or the command descriptions in z/OS Security Server RACF Command Language Reference.

For example, to allow logons at a terminal only between 7 a.m. and 5 p.m. during the week, specify WHEN(DAYS(WEEKDAYS) TIME(0700:1700)) on the RDEFINE or RALTER command.