Sierra Time Zone - S

The Sierra time zone (S) is the sixth zone to the west of the Greenwich or Prime Meridian, with an offset of UTC -6:00. This means that it is six hours behind Coordinated Universal Time (UTC).

The US Military, Chinese Military, and several others have adopted a unique list of names for the time zones across the world. The names use the NATO phonetic alphabet which calls for the 26 letters of the alphabet to be designated by easily recognizable words. The Sierra time zone is one of these.

 The Sierra time zone is primarily used in aviation and military operations.

Other time zones that include the same offset are Central Standard Time (CST), Galapagos Time (GALT), and Mountain Daylight Time (MDT).