GMT to SST Converter

Samoa Standard Time (SST) is a time zone located in the South Pacific Ocean. It operates at UTC-11 (eleven hours behind Coordinated Universal Time). It is officially observed in American Samoa (including Pago Pago) and the Midway Islands.

Greenwich Mean Time (GMT) is the standard time reference running at UTC+0 along the Prime Meridian (0° longitude) in Greenwich, London.

Samoa Standard Time (SST) is exactly 11 hours behind Greenwich Mean Time (GMT). To convert GMT to SST, subtract 11 hours from the GMT clock time.

No. American Samoa and other territories on SST do not observe Daylight Saving Time. SST remains permanently at UTC-11 throughout the entire year.

In December 2011, the independent nation of Samoa skipped a calendar day to jump across the International Date Line to UTC+13 to align its business hours with Australia and New Zealand. American Samoa chose to remain on the eastern side of the date line at UTC-11 to preserve economic ties with the United States mainland.

SST is observed in American Samoa (Tutuila, Manu'a Islands, Rose Atoll, Swains Island), the Midway Atoll, and unorganized US island territories like Jarvls Island and Palmyra Atoll.

The best overlap window is between 7:00 PM GMT and 9:00 PM GMT. In Pago Pago (SST), this corresponds to 8:00 AM SST to 10:00 AM SST, allowing American Samoa offices to start their morning while London wraps up its evening.

Because SST is 11 hours behind GMT, any GMT timestamp between 12:00 AM Midnight and 10:59 AM GMT corresponds to the previous calendar afternoon or evening in Samoa Standard Time.

The official IANA database key for Samoa Standard Time is Pacific/Pago_Pago.

Yes. Located just east of the International Date Line at UTC-11, American Samoa is among the very last inhabited places on Earth to celebrate New Year's Eve and enter a new date.

Maritime freight shipping between Europe and South Pacific tuna packing ports in Pago Pago uses UTC timestamps for vessel telemetry, converting arrival logs into local SST.

Subtract 11 hours from the GMT time. If the result is negative, add 24 hours and roll back to the previous calendar day. Example: 4:00 AM GMT Tuesday minus 11 hours = 5:00 PM SST Monday.

No. Despite the name, independent Samoa uses West Samoa Time (WST, UTC+13). Only American Samoa (a US territory) uses Samoa Standard Time (SST, UTC-11). The two neighboring island groups are 24 hours apart in clock date despite being separated by less than 100 miles of ocean!

During the UK summer (BST, UTC+1), London moves to UTC+1 while American Samoa stays at UTC-11. The time gap between London and Pago Pago increases to 12 hours.

Federal agencies in Washington D.C. (EST, UTC-5) communicate with Pago Pago (SST, UTC-11), which is 6 hours behind US Eastern time.

Key economic drivers include tuna canning and processing, international marine fisheries, tourism, US federal administration, and local government operations.

Our converter uses standard IANA time zone database definitions via native browser engine APIs, ensuring 100% precision without manual adjustment.

Midway Atoll operates on UTC-11 year-round, making it exactly 11 hours behind GMT year-round.

Honolulu operates on Hawaii Standard Time (HST, UTC-10). Pago Pago operates on SST (UTC-11). American Samoa is 1 hour behind Hawaii.

Pago Pago is located approximately 9,600 miles (15,400 km) southwest of London across the Atlantic Ocean, North America, and the South Pacific Ocean.

Located near latitude 14° South, American Samoa experiences virtually uniform daylight hours year-round, making seasonal daylight saving shifts unnecessary.

Wire transfers initiated during London banking hours (e.g. 2:00 PM GMT) reach American Samoa during early morning hours (3:00 AM SST) for processing when Pago Pago banks open.

Pago Pago is the capital and main harbor of American Samoa, operating permanently on Samoa Standard Time (SST, UTC-11).

Oceanographic vessels log underwater sensor data and bathymetric mapping in UTC, rendering local environmental reports in SST.

During UK winter (GMT, UTC+0), London is 11 hours ahead of Pago Pago (SST, UTC-11).

During UK summer (BST, UTC+1), London is 12 hours ahead of Pago Pago (SST, UTC-11).

No. American Samoa stays at UTC-11 year-round without daylight saving adjustments.

National Weather Service offices in Pago Pago receive international GFS models in UTC and publish tropical cyclone warnings in local SST.

Pago Pago operates on SST (UTC-11) and Tokyo operates on JST (UTC+9). Tokyo is 20 hours ahead of Pago Pago (or Pago Pago is 4 hours ahead on the previous date).

Pago Pago is on SST (UTC-11) and Sydney is on AEST (UTC+10) or AEDT (UTC+11). Sydney is 21 to 22 hours ahead of Pago Pago across the date line.

High school and territorial sports events in Pago Pago airing at 7:00 PM SST air at 1:00 AM EST on the US East Coast.

American Samoa uses the US Dollar ($ USD), but operates on Samoa Standard Time (SST, UTC-11).

Our converter leverages standard IANA timezone database rules to map Pacific/Pago_Pago (-11:00), ensuring accurate offset conversions for all historical and future timestamps.

Tutuila is the main and most populous island in American Samoa, home to the capital Pago Pago, operating on SST (UTC-11).

The Manu'a Islands (Taʻu, Ofu, and Olosega) are part of American Samoa and operate on Samoa Standard Time (SST, UTC-11).

Pago Pago is the territorial capital of American Samoa, operating on SST (UTC-11) year-round.

Pago Pago Harbor is the deepest natural harbor in the South Pacific, serving international shipping on SST.

Midway Atoll operates on Samoa Standard Time (SST, UTC-11) year-round.

Jarvis Island operates on Samoa Standard Time (SST, UTC-11) year-round.

Palmyra Atoll operates on Samoa Standard Time (SST, UTC-11) year-round.

Swains Island is an atoll in Tokelau chain governed as part of American Samoa, operating on SST (UTC-11).