Daylight saving time definition
If you are using a locale that has been customized wth LC_TOD, you need to be aware that as of z/OS® V1R9, the Language Environment® default daylight saving time (that for the U.S. Eastern time zone) is changed.
To retain the earlier daylight saving time, use either of the following
methods:
- If the TZ environment variable is defined, reset it to override the default time zone, which is the U.S. Eastern time zone. TZ is typically set (with the value that is defined in either the /etc/environment or /etc/profile files) when the system is started.
- Replace the values in the time_t structure with those
saved from your earlier time.h header
file.
Note: The time.h header file contains declarations of all timezone-related subroutines and externals, as well as the tm structure.