Precedence of default time zone sources for ABL time date functions
The ABL TODAY, TIME, NOW, MTIME and TIMEZONE functions as well as database and temp-table fields with initial values of TODAY or NOW need a default time zone in order to be correctly resolved by the AVM. The following list describes the different time sources. The first item has the lowest precedence.
The default time zone of the operating system where the current session is running.
The time zone offset specified in the TIMEZONE attribute of the SESSION system handle. This attribute can be changed within the session.
The time zone of the server specified in the TIME-SOURCE attribute of the SESSION system handle. This attribute can be changed within the session.