The following time zones are known by the Nightmare Driver. US/Alaska US/Aleutian US/Arizona US/Central US/Eastern US/East-Indiana US/Hawaii US/Indiana-Starke US/Michigan US/Mountain US/Pacific US/Samoa Most time zones from the following URL should work: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones Note: the casing of the timezone when used matters, ensure you use the exact casing displayed or your time may remain incorrect. See also: setenv