SST to HST Converter
Convert time between Samoa Standard Time (SST) and Hawaii Standard Time (HST)
Samoa Standard Time (SST)
Hawaii Standard Time (HST)
Time Difference
Hawaii Standard Time (HST) is 0 hours ahead of Samoa Standard Time (SST)
Select Date
Select Time
Quick Reference
| SST | HST |
|---|---|
| 15:00 | 16:00 |
| 17:00 | 18:00 |
| 19:00 | 20:00 |
| 21:00 | 22:00 |
| 23:00 | 00:00 |
| 01:00 | 02:00 |
| 03:00 | 04:00 |
| 05:00 | 06:00 |
| 07:00 | 08:00 |
| 09:00 | 10:00 |
| 11:00 | 12:00 |
| 13:00 | 14:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About SST to HST Time Conversion
Converting time between Samoa Standard Time (SST) and Hawaii Standard Time (HST) is the simplest South Pacific to Pacific conversion you'll meet. SST is UTC-11 and HST is UTC-10, putting Hawaii just 1 hour ahead of American Samoa. Neither side observes daylight saving — Hawaii never adopted it, and American Samoa stays on SST year-round — so the 1-hour offset is identical every day of the year.
This converter uses the IANA timezone database (Pacific/Honolulu) to give accurate results. Whether you're booking a call between Pago Pago and Honolulu, coordinating with Hawaiian businesses, or planning a quick island-hop, the tool removes the manual offset arithmetic for what is essentially a one-hour adjustment.
Common Use Cases for SST to HST Conversion
Business & Work
- Scheduling video calls between American Samoa and Honolulu
- Coordinating Pacific island logistics, fisheries, and tourism operations
- Managing US territory operations across SST and HST
Personal & Travel
- Calling family between American Samoa and Hawaii
- Planning flights between Pago Pago and Honolulu
- Coordinating cross-island events for the Pacific diaspora
Time Zone Information
Samoa Standard Time (SST)
- UTC Offset: UTC-11
- IANA Timezone: Pacific/Pago_Pago
- Daylight Saving: None - American Samoa does not observe daylight saving time
- Major Cities: Pago Pago, Tafuna, Nu'uuli, Faleniu, Aua
- Coverage: American Samoa and Midway Atoll
Hawaii Standard Time (HST)
- UTC Offset: UTC-10
- IANA Timezone: Pacific/Honolulu
- Daylight Saving: None - Hawaii does not observe daylight saving time
- Major Cities: Honolulu, Hilo, Kailua, Kaneohe, Pearl City
- Coverage: Hawaii
Quick Reference: SST to HST
Remember: HST is always 1 hour ahead of SST. Neither timezone observes daylight saving, so the offset stays the same year-round.
Frequently Asked Questions
What is the time difference between SST and HST?
Samoa Standard Time (SST) is UTC-11, while Hawaii Standard Time (HST) is UTC-10. HST is 1 hour ahead of SST. When it is 12:00 PM in Pago Pago, it is 1:00 PM the same day in Honolulu.
When does this SST to HST conversion apply?
It applies year-round. Neither American Samoa nor Hawaii observes daylight saving time, so the 1-hour offset between SST and HST is stable every day of the year.
How does the time difference change throughout the year?
It does not. Both SST and HST are fixed offsets with no daylight saving — Hawaii has never adopted it and American Samoa never has either. The gap stays at exactly 1 hour regardless of season.
What are the best times for SST–HST business calls?
The 1-hour offset means almost the entire working day overlaps. Any standard business window in either zone — for example 9:00 AM to 5:00 PM SST is 10:00 AM to 6:00 PM HST — works for both sides.
Which countries and regions use HST?
Hawaii Standard Time is used across Hawaii, including Honolulu, Hilo, Kailua, Kaneohe, and Pearl City. Some neighbouring Pacific zones (such as parts of the Aleutian Islands) also use HST as Hawaii–Aleutian Standard Time.
Which countries and regions use SST?
Samoa Standard Time (UTC-11) is used in American Samoa and the uninhabited Midway Atoll. The independent state of Samoa is on UTC+13, on the opposite side of the international date line. Major American Samoa locations include Pago Pago, Tafuna, and Nu’uuli.
Pro Tips
- • HST is always 1 hour ahead of SST — the simplest US Pacific-region conversion you will meet.
- • Neither side observes daylight saving, so this offset is stable year-round.
- • Almost any standard working window fits both zones with minimal adjustment.
- • Same calendar day applies for any reasonable SST↔HST business hour, no date-line crossing.
- • Hawaii flights from American Samoa typically take 5–6 hours direct; the 1-hour timezone shift makes jet lag minimal.
- • For one-off calls, double-check the IANA zones (Pacific/Pago_Pago, Pacific/Honolulu) in your calendar tool.