AUTORESETTIME

The AUTORESETTIME parameter specifies the action CICS® takes for automatic time changes.

AUTORESETTIME={IMMEDIATE|NO|YES}
Valid values are as follows:
IMMEDIATE
CICS issues a PERFORM RESET command to synchronize the CICS time-of-day with the system time-of-day if, at the next task attach, the CICS time-of-day differs from the system time-of-day. CICS issues message DFHIC0801 when the times are synchronized.
NO
CICS issues message DFHAP1500 to indicate that a CEMT PERFORM RESET command is required to synchronize the CICS time-of-day with the system time-of-day.
YES
CICS issues a PERFORM RESET command to synchronize the CICS time-of-day with the system time-of-day if, at the next local midnight, the CICS time-of-day differs from the system time-of-day by more than 30 minutes. For example, setting clocks forward or back to adjust for summer and winter time. CICS issues message DFHIC0801 when the times are synchronized.
Note: Setting clocks back might cause end-of-day statistics to be written twice.