As of release 18.5, the date-time stamps in log records are stored as UTC, not local time as it was previously.
There is no documented way to programmatically convert a UTC date-time stamp to local time.
However, IDMSIN01 with REQUEST-CODE=5 and DTS-FORMAT=7, can be used to perform such a conversion.
The attached cobol program, samputcl.txt is an example of how to do this.
For more information, see “CA IDMS r18.5 Release Notes 2nd Edition” chapter 2 “New Features”, “Daylight Savings Time – UTC Time Stamps”.