This object is used to manage the system clock time, date and timezone.
If the Network Time Protocol (NTP) is enabled, attempts to set this
object will result in an inconsistantValue error. For sets, the
implementation may check the value of the year and if it is outside of a
'reasonable' range (e.g., 1999..2035) it may return an inconsistantValue
error. Only system clock time and date will be set if the timezone
offset is not set along with the timezone name.