Time zones in SLAs You can specify the geographical time zone that is used for schedule calculation. Specify the time zone source to be used when creating task SLAs. You can select one of the following options: The caller's timezone: If this option is selected and the caller has not selected a time zone, then the system time zone is used. The SLA definition's timezone: If the The SLA definition's timezone option is selected, the Timezone list appears. Timezone: Specify a time zone for the SLA. The time zone can be the system time zone or active standard geographical time zones. The CI location's timezone The task location's timezone The callers' location's timezone Note: If you select a time zone source other than the The SLA definition's timezone and the time zone derived from the time zone source is empty, the system time zone is used.