You must specify the time zone for your instance. This value is stored in the II_TIMEZONE_NAME environment variable.

Some systems use a default value for II_TIMEZONE_NAME. If you are in a different time zone from the default, you must change the value of II_TIMEZONE_NAME.

Time zone names are organized by world region. In some cases, the time zone name is a positive or negative offset from Greenwich Mean Time (for example, GMT2 or GMT-2). If you are unable to locate the correct time zone within one of the designated world regions, use the GMT‑OFFSET world region and specify one of the GMT offsets as your time zone.

The time zone parameter tells Ingres what adjustments to make for Daylight Savings Time. If you must make other adjustments for special time changes imposed in your area (such as for energy conservation purposes), you can use the iizic time zone compiler provided in the distribution.