HKT to SST Converter
Convert time between Hong Kong Time (HKT) and Samoa Standard Time (SST)
Hong Kong Time (HKT)
Samoa Standard Time (SST)
Time Difference
Samoa Standard Time (SST) is 0 hours ahead of Hong Kong Time (HKT)
Select Date
Select Time
Quick Reference
| HKT | 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 HKT to SST Time Conversion
Converting time between Hong Kong Time (HKT) and Samoa Standard Time (SST) is a fixed 19-hour calculation. HKT is UTC+8 year-round, and SST is UTC-11 year-round, so Hong Kong is always 19 hours ahead of Pago Pago and the rest of American Samoa. Neither side observes daylight saving time, so the offset never shifts. Note that SST here refers to American Samoa, not Singapore — Singapore uses SGT (UTC+8).
This time zone converter uses the IANA timezone database (Asia/Hong_Kong and Pacific/Pago_Pago) for accurate calculations. SST sits across the International Date Line from Hong Kong, so most Hong Kong daytime hours fall on the previous calendar day in American Samoa. Independent Samoa (the country, not the territory) switched to UTC+13 in 2011 and now uses WSST/WSDT — it is a full day ahead of American Samoa despite being a few miles apart geographically.
Common Use Cases for HKT to SST Conversion
Business & Work
- Scheduling Pacific-region calls between Hong Kong and Pago Pago
- Coordinating shipping, fisheries and government workflows with American Samoa
- Planning logistics across the International Date Line
Personal & Travel
- Planning travel from Hong Kong to American Samoa via Hawaii or Auckland
- Coordinating with family and friends in Pago Pago
- Scheduling virtual events with American Samoa-based contacts
Time Zone Information
Hong Kong Time (HKT)
- UTC Offset: UTC+8
- IANA Timezone: Asia/Hong_Kong
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Hong Kong, Kowloon, Tsuen Wan, Yuen Long
- Coverage: Hong Kong Special Administrative Region
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, Leone, Faleniu
- Coverage: American Samoa (US territory)
Quick Reference: HKT to SST
Remember: SST is 19 hours behind HKT, year-round. Hong Kong daytime falls on the previous calendar day in American Samoa — always label the date. SST here is American Samoa, not Singapore (Singapore uses SGT, UTC+8).
Frequently Asked Questions
What is the time difference between HKT and SST?
Hong Kong Time (HKT) is UTC+8, while Samoa Standard Time (SST) is UTC-11. SST is 19 hours behind HKT, year-round. When it is 12:00 PM in Hong Kong, it is 5:00 PM the previous day in Pago Pago, American Samoa.
Is SST the same as Singapore time?
No. SST here means Samoa Standard Time, used in American Samoa (UTC-11). Singapore uses SGT (UTC+8) — see HKT to SGT for that. The abbreviation collision is common, so always confirm which "SST" you mean.
Why does the calendar date often differ between HKT and SST?
With a 19-hour gap that crosses the International Date Line, most Hong Kong daytime hours fall on the previous calendar day in American Samoa. Wednesday 3:00 PM HKT is still Tuesday 8:00 PM SST. Always label the date explicitly when sending invites.
Does Samoa (the country) also use SST?
No, not since 2011. Independent Samoa (the country) switched from UTC-11 to UTC+13 on 30 December 2011 to align with its main trade partners. It now uses WSST/WSDT and is a full day ahead of American Samoa. American Samoa, a US territory, stayed at UTC-11.
Which regions use SST?
SST (UTC-11) is used in American Samoa and a few small Pacific territories. Major populated places include Pago Pago, Tafuna, Leone and Faleniu. Independent Samoa, geographically next door, is on UTC+13.
Which countries or regions use HKT?
Hong Kong Time is used in the Hong Kong Special Administrative Region. The same UTC+8 offset is shared with mainland China (CST), Taiwan, Singapore (SGT), the Philippines (PHT) and Western Australia (AWST).
Pro Tips
- • SST is 19 hours behind HKT — subtract 19 hours and the date usually rolls back one day for American Samoa.
- • No DST on either side. The 19-hour offset is stable every day of the year.
- • SST here = American Samoa (UTC-11). Singapore is SGT (UTC+8); never confuse them.
- • Independent Samoa is 24 hours ahead of American Samoa — the same clock time but a different date.
- • For live calls, try HKT early evening (HKT 7:00 PM = SST 12:00 AM previous day) — that's midnight in Pago Pago, so async is usually better.
- • Use IANA identifier Pacific/Pago_Pago in calendars to keep things future-proof.