AWST to SST Converter
Convert time between Australian Western Standard Time (AWST) and Samoa Standard Time (SST)
Australian Western Standard Time (AWST)
Samoa Standard Time (SST)
Time Difference
Samoa Standard Time (SST) is 0 hours ahead of Australian Western Standard Time (AWST)
Select Date
Select Time
Quick Reference
| AWST | 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 AWST to SST Time Conversion
Converting time between Australian Western Standard Time (AWST) and Samoa Standard Time (SST) is one of the easier Australia-to-Pacific conversions because neither side observes daylight saving time. AWST is UTC+8 and SST is UTC-11, making SST 19 hours behind AWST year-round. That stable offset is unusual for a transpacific pair — most other Australian states adjust seasonally, but Western Australia does not.
This converter uses the IANA timezone database to handle the date-line crossing automatically. Whether you're booking a call between Perth and Pago Pago, coordinating with mining or maritime operations on Australia's west coast, or planning travel via Singapore or Bali, the tool removes the off-by-one-day confusion that catches people out converting between Western Australia and American Samoa.
Common Use Cases for AWST to SST Conversion
Business & Work
- Scheduling video calls between Perth or Broome and American Samoa
- Coordinating Western Australia–Pacific mining and maritime logistics
- Planning conference calls that bridge West Coast Australian and Samoan working hours
Personal & Travel
- Calling family in American Samoa from Perth, Broome, or Karratha
- Planning flight connections via Perth and Southeast Asia to American Samoa
- Coordinating travel through Western Australia and the Pacific rim
Time Zone Information
Australian Western Standard Time (AWST)
- UTC Offset: UTC+8
- IANA Timezone: Australia/Perth
- Daylight Saving: None - Western Australia does not observe daylight saving time
- Major Cities: Perth, Fremantle, Mandurah, Bunbury, Broome
- Coverage: Western Australia
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
Quick Reference: AWST to SST
Remember: SST is always 19 hours behind AWST. Neither timezone observes daylight saving, so this offset is stable year-round.
Frequently Asked Questions
What is the time difference between AWST and SST?
Australian Western Standard Time (AWST) is UTC+8, while Samoa Standard Time (SST) is UTC-11. SST is 19 hours behind AWST year-round. When it is 12:00 PM in Perth, it is 5:00 PM the previous day in Pago Pago.
When does this AWST to SST conversion apply?
It applies year-round. Neither Western Australia nor American Samoa observes daylight saving, so the 19-hour offset is stable in every month of the year.
How does the time difference change throughout the year?
It does not change. AWST stays on UTC+8 and SST stays on UTC-11 year-round. That makes this one of the most predictable transpacific conversions — the only complication is the date-line crossing.
What are the best times for AWST–SST business calls?
A 19-hour gap with the date line in between leaves only a thin overlap window. Early-morning AWST (8:00–9:00 AM in Perth) maps to 1:00–2:00 PM the previous day in Pago Pago — late lunch on one side, breakfast on the other.
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.
Which countries and regions use AWST?
Australian Western Standard Time covers Western Australia. Major cities include Perth, Fremantle, Mandurah, Bunbury, and Broome. Western Australia does not observe daylight saving.
Pro Tips
- • SST is always 19 hours behind AWST — no DST on either side, so the offset is rock-solid year-round.
- • There is no seasonal shift to worry about, but always confirm the date because of the international date line.
- • Early-morning AWST is the best window for live calls; afternoon AWST drifts off Pago Pago's working day.
- • Asynchronous handoffs work well: end-of-day in Perth lands at the start of the previous calendar day in Pago Pago.
- • Western Australia stays on AWST while the eastern states shift to AEDT — the AWST-to-SST gap stays at 19 hours regardless.
- • For one-off calls, double-check the IANA zones (Australia/Perth, Pacific/Pago_Pago) in your calendar tool.