HKT to KST Converter
Convert time between Hong Kong Time (HKT) and Korea Standard Time (KST)
Hong Kong Time (HKT)
Korea Standard Time (KST)
Time Difference
Korea Standard Time (KST) is 0 hours ahead of Hong Kong Time (HKT)
Select Date
Select Time
Quick Reference
| HKT | KST |
|---|---|
| 10:00 | 11:00 |
| 12:00 | 13:00 |
| 14:00 | 15:00 |
| 16:00 | 17:00 |
| 18:00 | 19:00 |
| 20:00 | 21:00 |
| 22:00 | 23:00 |
| 00:00 | 01:00 |
| 02:00 | 03:00 |
| 04:00 | 05:00 |
| 06:00 | 07:00 |
| 08:00 | 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 HKT to KST Time Conversion
Converting time between Hong Kong Time (HKT) and Korea Standard Time (KST) is a steady 1-hour calculation. HKT is UTC+8 year-round, while KST is UTC+9, so Hong Kong is always 1 hour behind Seoul, Busan, Incheon and Daegu. Neither side observes daylight saving time, so the offset never shifts.
This time zone converter uses the IANA timezone database (Asia/Hong_Kong and Asia/Seoul) for accurate calculations. KST shares the same UTC+9 offset as Japan, so Hong Kong to Korea and Hong Kong to Japan conversions yield identical clock times. Whether you are scheduling Hong Kong to Seoul calls, coordinating with Korean partners or planning a trip, the 1-hour offset stays constant every day of the year.
Common Use Cases for HKT to KST Conversion
Business & Work
- Scheduling calls between Hong Kong and Seoul, Busan or Incheon offices
- Coordinating electronics, finance and entertainment workflows across East Asia
- Planning conference calls with Korean partners with near-full workday overlap
Personal & Travel
- Planning travel from Hong Kong to South Korea
- Coordinating with family and friends in Seoul, Busan or Daegu
- Scheduling virtual events with Korea-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
Korea Standard Time (KST)
- UTC Offset: UTC+9
- IANA Timezone: Asia/Seoul
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Seoul, Busan, Incheon, Daegu, Daejeon, Gwangju
- Coverage: South Korea
Quick Reference: HKT to KST
Remember: KST is 1 hour ahead of HKT, year-round. Korea shares its UTC+9 offset with Japan (JST), so Hong Kong to Seoul and Hong Kong to Tokyo give the same clock times.
Frequently Asked Questions
What is the time difference between HKT and KST?
Hong Kong Time (HKT) is UTC+8, while Korea Standard Time (KST) is UTC+9. KST is 1 hour ahead of HKT, year-round. When it is 12:00 PM in Hong Kong, it is 1:00 PM in Seoul, Busan or Incheon.
Does either side observe daylight saving time?
No. Hong Kong stays on HKT (UTC+8) year-round, and South Korea stays on KST (UTC+9) year-round. Korea last used DST briefly during the 1987-1988 period around the Seoul Olympics; it has not been used since. The 1-hour offset never changes.
Is KST the same as Japan Standard Time?
Yes, in clock terms. KST and JST both use UTC+9, so any HKT-to-KST conversion gives the same clock time as HKT-to-JST. The two are physically separate timezones but share the same offset.
What are the best times for HKT-KST business calls?
Almost any working hour works. Hong Kong 9:00 AM to 6:00 PM HKT maps to Seoul 10:00 AM to 7:00 PM KST — full workday overlap. Lunch breaks line up similarly (HKT noon = KST 1:00 PM).
Which regions use KST?
KST is used in South Korea. Major cities include Seoul, Busan, Incheon, Daegu, Daejeon and Gwangju. North Korea returned to UTC+9 in 2018 after a brief period at UTC+8:30, so the entire Korean peninsula now shares this offset.
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
- • KST is 1 hour ahead of HKT — add 1 hour to Hong Kong time to get Seoul or Busan time.
- • No DST on either side. The 1-hour offset is stable every day of the year.
- • Workdays overlap fully: HKT 9:00 AM to 6:00 PM = KST 10:00 AM to 7:00 PM — easy live meeting window.
- • KST and JST (Japan) share UTC+9, so HKT-to-Seoul and HKT-to-Tokyo give the same clock time.
- • North Korea is also on UTC+9 (since 2018), so the whole peninsula is on one clock when planning regional calls.
- • Use IANA identifier Asia/Seoul in calendars to keep things future-proof.