Multiple Global Meanings for SST
The abbreviation SST has multiple official meanings across different continents and legal jurisdictions. Below are all recognized global definitions:
Region: American Samoa (Tutuila, Manu'a, Rose Atoll, Swains Island), Midway Atoll
Daylight Saving: No daylight saving shift
Technical Specifications & Standards
Official chronometric properties, ISO standards, and international database registry identifiers for Samoa Standard Time:
Daylight Saving Time (DST) Transitions
⬆️ Spring Forward (Clocks Advance)
None
⬇️ Fall Back (Clocks Return)
None
Observing Jurisdictions & Subdivisions
3 Sovereign NationsSovereign nations, administrative subdivisions, and regional territories officially operating under SST:
Regional Subdivisions & Territory Details
Financial Markets & Trading Hours
Coordinates American tuna cannery shipments, South Pacific shipping, and US federal agency operations.
Local Hours: 08:00 - 16:30 SST
UTC Window: 19:00 - 03:30 UTC
Major Cities in SST
Primary metropolitan centers and financial hubs observing this time zone:
Adoption History & Astronomical Facts
Year Established: 1911
SST was observed by both American Samoa and independent Western Samoa until December 29, 2011, when independent Samoa jumped across the International Date Line to UTC+13. American Samoa remained on UTC-11.
Because independent Samoa jumped the Date Line in 2011 while American Samoa stayed behind, traveling 70 kilometers between Apia and Pago Pago sets your calendar back by 24 hours (25 hours in summer).
Frequently Asked Questions about SST
What is Samoa Standard Time?
Samoa Standard Time (SST) is UTC-11, observed in the US territory of American Samoa.
What is the time difference between American Samoa and independent Samoa?
American Samoa is 24 hours behind independent Samoa (25 hours during DST).
Does American Samoa observe daylight saving?
No. American Samoa stays on UTC-11 all year round.