The current Time Zone of the system in the following format:
<+|->HH:MM, where HH is the number of hours and MM is the
number of minutes. <+/-> specifies the East/West direction.
For example, EST would be displayed as: -05:00. The ':' is
optional, making this variable conform to ISO-8601
If aiSCDaylightSavingEnabled is disabled(1), then that is
also the value of this object. Otherwise,
aiSCDaylightSavingStatus is active(2) if we are currently
observing Daylight Savings Time and inactive(3) otherwise.