Tuesday Tip: (CA IDMS) Daylight Saving time changes

Discussion created by Eddy_G Employee on Oct 9, 2014

CA IDMS Tuesday Tip by Edward Gorga, Principal Support Engineer for October 8, 2014


The procedures for daylight saving time changes for IDMS are documented in informational PTF QI52458.

This has recently been updated with the changes made to IDMS 18.5:


CA IDMS R18.5 contains new UTC time processing routines and uses

UTC time stamps. External times are still entered and

displayed in local time. Internally, times are in UTC, so most

processing is unaffected by changing the time zone or local

date/time in the system. Log records now contain UTC time stamps.

Journal records already contain UTC timestamps.

As a result, CA IDMS 18.5 z/OS CVs and z/OS local batch and

z/OS batch-to-CV jobs can remain active while the system time

is advanced or set back one hour. z/VSE sites should follow

the same procedure as documented below for CA IDMS R17.0 z/VSE.


Note: Program IDMSDST has been de-activated and will no longer

      be invoked when there is a change in Daylight Saving Time.



If you are running a release prior to 18.5 then you still need to follow the procedures in QI52458.