You can change the system time while the CICS® Universal Client is running. If you change the system time, an active process responds to the changed time and not to the elapsed time.
When setting clocks forward or back, the behavior of timeout
settings will change. When the clock is set back the elapsed time for a timeout
may be increased. When the clock is set forward a timeout may expire earlier.
The maximum elapsed time for a timeout will be the original timeout value
plus the value of the change in time. For example, if the current time is
19:00, and a timeout is set to expire 5 minutes from now; the effect of setting
the clock back by 1 hour is to increase the value of the timeout by 1 hour.
The total elapsed time for the timeout is 1 hour and 5 minutes.