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Use this S Time Converter page to check current local time, UTC and GMT offset, daylight saving details, related time zones, and popular time converter links.

Sierra Time Zone

Offset: S is 6 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Belize, Canada, Chile, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, United States

Principal Cities: The largest city in the S time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Puebla, Santiago de Querétaro.

Daylight Saving: Some places on Sierra Time Zone (S) keep the same time all year, while others use S for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.

Map of the areas on Sierra Time Zone (S)
S all year S part of the year

Today some of the lighter areas are on UTC−5 (Central Daylight Time).

S representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for S
  • S - short form of 'Sierra'
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone