SST to KST Converter
Convert time between Samoa Standard Time (SST) and Korea Standard Time (KST)
Samoa Standard Time (SST)
Korea Standard Time (KST)
Time Difference
Korea Standard Time (KST) is 0 hours ahead of Samoa Standard Time (SST)
Select Date
Select Time
Quick Reference
| SST | KST |
|---|---|
| 15:00 | 11:00 |
| 17:00 | 13:00 |
| 19:00 | 15:00 |
| 21:00 | 17:00 |
| 23:00 | 19:00 |
| 01:00 | 21:00 |
| 03:00 | 23:00 |
| 05:00 | 01:00 |
| 07:00 | 03:00 |
| 09:00 | 05:00 |
| 11:00 | 07:00 |
| 13:00 | 09:00 |
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 KST Time Conversion
Converting time between Samoa Standard Time (SST) and Korea Standard Time (KST) bridges the South Pacific and the Korean Peninsula. SST is UTC-11 and KST is UTC+9, making KST 20 hours ahead of SST. Both timezones are stable year-round — American Samoa never observes daylight saving and South Korea has not used DST since 1988 — so the 20-hour offset is identical every day of the year, with the international date line in between.
This converter uses the IANA timezone database (Asia/Seoul) to give accurate results. Whether you're booking a call between Pago Pago and Seoul or Busan, coordinating with Korean remote teams, or planning travel via South Korea, the tool removes the manual offset arithmetic for what is effectively a near-full-day shift.
Common Use Cases for SST to KST Conversion
Business & Work
- Scheduling video calls between American Samoa and Seoul, Busan, or Incheon
- Coordinating Pacific–Korea logistics and shipping operations
- Planning conference calls that bridge Samoan and Korean working hours
Personal & Travel
- Calling family in South Korea from American Samoa
- Planning travel itineraries connecting through Seoul
- Watching live KBO baseball, K-League, or K-pop broadcasts
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
Korea Standard Time (KST)
- UTC Offset: UTC+9
- IANA Timezone: Asia/Seoul
- Daylight Saving: None - South Korea does not observe daylight saving time
- Major Cities: Seoul, Busan, Incheon, Daegu, Daejeon
- Coverage: South Korea and North Korea
Quick Reference: SST to KST
Remember: KST is always 20 hours ahead of SST. Neither side observes daylight saving, so the offset is stable year-round.
Frequently Asked Questions
What is the time difference between SST and KST?
Samoa Standard Time (SST) is UTC-11, while Korea Standard Time (KST) is UTC+9. KST is 20 hours ahead of SST. When it is 12:00 PM in Pago Pago, it is 8:00 AM the next day in Seoul.
When does this SST to KST conversion apply?
It applies year-round. Neither side observes daylight saving — American Samoa never has, and South Korea has not used DST since 1988. The 20-hour offset is identical every day of the year.
How does the time difference change throughout the year?
It does not. Both SST and KST are fixed offsets with no daylight saving, so the gap stays at exactly 20 hours regardless of season. That makes recurring meetings between American Samoa and Korea easier to maintain.
What are the best times for SST–KST business calls?
The 20-hour offset is effectively a near-full-day shift — Pago Pago afternoon aligns with Korean morning. For example, 3:00–5:00 PM SST is 11:00 AM–1:00 PM KST the next day, comfortable for Seoul midday.
Which countries and regions use KST?
Korea Standard Time is used in South Korea and North Korea. Major South Korean cities include Seoul, Busan, Incheon, Daegu, and Daejeon. KST has the same UTC+9 offset as Japan Standard Time (JST) but is a separate timezone identifier.
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
- • KST is always 20 hours ahead of SST — neither side observes DST, so the offset is stable year-round.
- • Recurring SST↔KST meetings hold their times all year, unlike most US-side conversions.
- • Pago Pago afternoon aligns with Seoul morning next day — a workable overlap for live calls.
- • Always include the date when scheduling SST↔KST meetings; the conversion always crosses midnight.
- • KST and JST have the same offset (UTC+9) but are separate timezones — use the right one for your contact.
- • For one-off calls, double-check the IANA zones (Pacific/Pago_Pago, Asia/Seoul) in your calendar tool.