AEDT to SST Converter
Convert time between Australian Eastern Daylight Time (AEDT) and Samoa Standard Time (SST)
Australian Eastern Daylight Time (AEDT)
Samoa Standard Time (SST)
Time Difference
Samoa Standard Time (SST) is 0 hours ahead of Australian Eastern Daylight Time (AEDT)
Select Date
Select Time
Quick Reference
| AEDT | SST |
|---|---|
| 12:00 | 15:00 |
| 14:00 | 17:00 |
| 16:00 | 19:00 |
| 18:00 | 21:00 |
| 20:00 | 23:00 |
| 22:00 | 01:00 |
| 00:00 | 03:00 |
| 02:00 | 05:00 |
| 04:00 | 07:00 |
| 06:00 | 09:00 |
| 08:00 | 11:00 |
| 10:00 | 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 AEDT to SST Time Conversion
Converting time between Australian Eastern Daylight Time (AEDT) and Samoa Standard Time (SST) is essential during Australia's summer months. AEDT is UTC+11, while SST is UTC-11 and stays constant year-round. That makes SST a full 22 hours behind AEDT — effectively a complete day's difference, with the international date line in between. AEDT applies in eastern Australia from the first Sunday in October to the first Sunday in April; outside that window the relevant timezone is AEST (UTC+10) and the gap shrinks to 21 hours.
This converter uses the IANA timezone database to handle the date-line crossing and AEDT/AEST transitions automatically. Whether you're booking a call between Sydney and Pago Pago during Australian summer, watching live cricket or NRL streams from American Samoa, or planning travel via the East Coast, the tool removes the off-by-one-day confusion that catches people out converting between eastern Australia and American Samoa.
Common Use Cases for AEDT to SST Conversion
Business & Work
- Scheduling video calls between Sydney or Melbourne and American Samoa during Australian summer
- Coordinating Australia–Pacific logistics, fisheries, and tourism operations
- Planning live broadcasts and webinars between the Australian East Coast and Pago Pago
Personal & Travel
- Calling family in American Samoa from NSW, Victoria, or Tasmania
- Planning flight connections via Sydney, Melbourne, or Brisbane to American Samoa
- Watching live AFL, NRL, and cricket from American Samoa
Time Zone Information
Australian Eastern Daylight Time (AEDT)
- UTC Offset: UTC+11
- IANA Timezone: Australia/Sydney
- Daylight Saving: First Sunday in October to first Sunday in April (AEDT)
- Major Cities: Sydney, Melbourne, Hobart, Canberra, Newcastle
- Coverage: New South Wales, Victoria, Tasmania, ACT (during summer)
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: AEDT to SST
Remember: SST is 22 hours behind AEDT. Outside Australian daylight saving the timezone is AEST (UTC+10) and the gap is 21 hours.
Frequently Asked Questions
What is the time difference between AEDT and SST?
Australian Eastern Daylight Time (AEDT) is UTC+11, while Samoa Standard Time (SST) is UTC-11. SST is 22 hours behind AEDT — almost a full day. When it is 12:00 PM in Sydney, it is 2:00 PM the previous day in Pago Pago.
When does this AEDT to SST conversion apply?
It applies during AEDT, from the first Sunday in October to the first Sunday in April. Outside that window the eastern Australian states are on AEST (UTC+10) and the gap drops to 21 hours. American Samoa stays on SST (UTC-11) year-round.
How does the time difference change throughout the year?
The gap is 22 hours during AEDT (October to April) and 21 hours during AEST (April to October). American Samoa never observes daylight saving, so any seasonal change comes from the Australian side. Queensland stays on AEST year-round, so the gap from Brisbane is always 21 hours.
What are the best times for AEDT–SST business calls?
A 22-hour gap is effectively a full day apart, so business hours never overlap. Treat handoffs as next-day rather than live calls: an end-of-day post in Sydney lands at the start of the previous calendar day in Pago Pago.
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 AEDT?
AEDT applies in eastern Australia during summer — New South Wales, Victoria, Tasmania, and the Australian Capital Territory. Major cities include Sydney, Melbourne, Hobart, Canberra, and Newcastle. Queensland does not observe daylight saving and stays on AEST year-round.
Pro Tips
- • SST is 22 hours behind AEDT — basically a full day, plus a date-line crossing, so always confirm the date.
- • American Samoa never observes daylight saving, so any seasonal shift comes from eastern Australia switching between AEDT and AEST.
- • A 22-hour gap means you cannot share a normal workday — treat communication as asynchronous handoffs.
- • Outside Australian daylight saving (April–October) the eastern states are on AEST (UTC+10) and the gap shrinks to 21 hours.
- • Recurring meetings drift twice a year unless you re-pin them around the AEDT/AEST switch.
- • For one-off calls, double-check the IANA zones (Australia/Sydney, Pacific/Pago_Pago) in your calendar tool.