For more information about managing time zone data, see also .
You will rarely need to modify a time zone's regional settings.
NOTE: For UTC deployments, you specify the full name of the applicable time zone as the value for the Default Time Zone system preference.
For more information, see About UTC System Preferences.
In the Details list, modify daylight savings time rule settings as necessary, or create a new rule.
(There is no New button, but you can create a new rule using Ctrl+N.
Alternatively, you can copy an existing rule and modify the copy.) Fields are described in the following table.
Time zone data includes the time zone name and standard abbreviation, its offset from UTC, daylight savings time (DST) data, and so on.Procedures are provided later in this topic for modifying time zones and for maintaining translations of time zones.The time zone records that are shipped with Siebel Business Applications as seed data include the world time zones.These are the same time zones used by Microsoft in its operating systems.However, you might want to modify other time zone settings such as the display name or daylight savings time rules, as these occasionally change.Daylight savings time rules are defined in detail records for applicable time zone records.