SGT to SST Converter
Convert time between Singapore Standard Time (SGT) and Samoa Standard Time (SST)
Singapore Standard Time (SGT)
Samoa Standard Time (SST)
Time Difference
Samoa Standard Time (SST) is 0 hours ahead of Singapore Standard Time (SGT)
Select Date
Select Time
Quick Reference
| SGT | SST |
|---|---|
| 10:00 | 15:00 |
| 12:00 | 17:00 |
| 14:00 | 19:00 |
| 16:00 | 21:00 |
| 18:00 | 23:00 |
| 20:00 | 01:00 |
| 22:00 | 03:00 |
| 00:00 | 05:00 |
| 02:00 | 07:00 |
| 04:00 | 09:00 |
| 06:00 | 11:00 |
| 08:00 | 13:00 |
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 SGT to SST Time Conversion
Converting time between Singapore Standard Time (SGT) and Samoa Standard Time (SST) is needed for coordinating across one of the largest stable time gaps on the planet. SGT is UTC+8 year-round, while SST is UTC-11, placing Singapore 19 hours ahead of American Samoa. Neither side observes daylight saving, so the 19-hour offset is constant 365 days a year.
This time zone converter uses the IANA timezone database to ensure accurate calculations. SST is the timezone of American Samoa (Pacific/Pago_Pago) and the Niue territory. Note: Samoa itself (the independent country) switched to UTC+13 in 2011 to align with Australasia — for that, use the SST-to-WST or other converters. Whether you're scheduling Singapore-Pago Pago meetings, planning Pacific travel, or coordinating with American Samoa, our converter provides reliable results.
Be aware: "SST" can ambiguously refer to Singapore Standard Time, Samoa Standard Time, or other zones. On this site `sst` specifically means Samoa Standard Time (UTC-11); Singapore uses the separate `sgt` slug.
Common Use Cases for SGT to SST Conversion
Business & Work
- Scheduling meetings between Singapore and American Samoa offices or partners
- Coordinating Pacific logistics, fisheries and shipping operations
- Planning conference calls across the International Date Line
Personal & Travel
- Planning Pacific travel itineraries between Singapore and American Samoa
- Coordinating with family and friends in Pago Pago, Tafuna or Nu'uuli
- Scheduling virtual events bridging Asia and the South Pacific
Time Zone Information
Singapore Standard Time (SGT)
- UTC Offset: UTC+8
- IANA Timezone: Asia/Singapore
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Singapore
- Coverage: Republic of Singapore
Samoa Standard Time (SST)
- UTC Offset: UTC-11
- IANA Timezone: Pacific/Pago_Pago
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Pago Pago, Tafuna, Nu'uuli, Leone, Faleniu
- Coverage: American Samoa and Niue
Quick Reference: SGT to SST
Remember: SST (Samoa) is 19 hours behind SGT, all year. Neither zone observes daylight saving so the offset never changes. Note that this SST is American Samoa (UTC-11), not the independent state of Samoa (UTC+13 since 2011).
Frequently Asked Questions
What is the time difference between SGT and SST?
Singapore Standard Time (SGT) is UTC+8, while Samoa Standard Time (SST) is UTC-11. SGT is 19 hours ahead of SST. When it is 12:00 PM in Singapore, it is 5:00 PM the previous day in Pago Pago.
When does this SGT to SST conversion apply?
All year round. Neither Singapore nor American Samoa observes daylight saving, so the 19-hour offset is constant 12 months a year — one of the largest stable cross-Pacific gaps.
Does Samoa Standard Time observe daylight saving?
No. American Samoa (Pacific/Pago_Pago) uses SST year-round. Note: the independent state of Samoa switched to UTC+13 in 2011 to align with Australasia — for that timezone, look for WST or NZDT, not SST.
What are the best times for SGT-SST business calls?
The 19-hour gap means live overlap is extremely narrow. Singapore early morning (4:00 to 7:00 AM SGT) maps to American Samoa afternoon (9:00 AM to 12:00 PM SST the previous day). For an American Samoa morning slot, late Singapore evening into the night (10:00 PM to 12:00 AM SGT) reaches 3:00 to 5:00 AM SST the same day.
Which countries or regions use SST?
Samoa Standard Time (UTC-11) is used by American Samoa and the Niue territory. Major locations include Pago Pago, Tafuna, Nu'uuli, Leone and Faleniu. Note: the independent state of Samoa abandoned UTC-11 in 2011 and now uses UTC+13.
Which countries or regions use SGT?
Singapore Standard Time is used only in the Republic of Singapore. UTC+8 is shared with Malaysia, Western Australia, Hong Kong, the Philippines and most of mainland China.
Pro Tips
- • SST is 19 hours behind SGT, all year. Singapore noon is 5 PM the previous day in Pago Pago.
- • Neither zone observes DST, so the offset is fixed and predictable.
- • SST here means American Samoa (UTC-11). The independent state of Samoa moved to UTC+13 in 2011 — do not confuse the two.
- • Almost any "morning" in one zone is the previous afternoon in the other — always include date plus time in scheduling messages.
- • For an American Samoa morning slot, late Singapore evening (10:00 PM to 12:00 AM SGT) works.
- • Use IANA identifier Pacific/Pago_Pago in calendars — both zones are stable so the offset stays put.