KST to HKT Converter
Convert time between Korea Standard Time (KST) and Hong Kong Time (HKT)
Korea Standard Time (KST)
Hong Kong Time (HKT)
Time Difference
Hong Kong Time (HKT) is 0 hours ahead of Korea Standard Time (KST)
Select Date
Select Time
Quick Reference
| KST | HKT |
|---|---|
| 11:00 | 10:00 |
| 13:00 | 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 |
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 KST to HKT Time Conversion
Converting time between Korea Standard Time (KST) and Hong Kong Time (HKT) is a steady 1-hour calculation. KST is UTC+9, while HKT is UTC+8 year-round, 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/Seoul and Asia/Hong_Kong) for accurate calculations. KST shares the same UTC+9 offset as Japan, so Korea to Hong Kong and Japan to Hong Kong conversions yield identical clock times. Whether you are scheduling Seoul to Hong Kong calls, coordinating with Hong Kong partners or planning a trip, the 1-hour offset stays constant every day of the year.
Common Use Cases for KST to HKT Conversion
Business & Work
- Scheduling calls between Seoul, Busan or Incheon and Hong Kong offices
- Coordinating electronics, finance and entertainment workflows across East Asia
- Planning conference calls with Hong Kong partners with near-full workday overlap
Personal & Travel
- Planning travel from South Korea to Hong Kong
- Coordinating with family and friends in Hong Kong from Seoul, Busan or Daegu
- Scheduling virtual events with Hong Kong-based contacts
Time Zone Information
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
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
Quick Reference: KST to HKT
Remember: HKT is 1 hour behind KST, year-round. Korea shares its UTC+9 offset with Japan (JST), so Seoul to Hong Kong and Tokyo to Hong Kong give the same clock times.
Frequently Asked Questions
What is the time difference between KST and HKT?
Korea Standard Time (KST) is UTC+9, while Hong Kong Time (HKT) is UTC+8. HKT is 1 hour behind KST. When it is 12:00 PM in Seoul, Busan or Incheon, it is 11:00 AM the same day in Hong Kong.
Does the offset change throughout the year?
No. Neither South Korea nor Hong Kong observes daylight saving time. The 1-hour offset is permanent and never shifts.
How big is the working-day overlap?
Almost complete. With only a 1-hour gap and both sides on year-round fixed offsets, the entire Korean workday (9:00 AM to 6:00 PM KST) sits inside the Hong Kong workday (8:00 AM to 5:00 PM HKT). Schedule freely.
What are the best times for KST-HKT business calls?
Anytime that suits both sides. Korean morning (10:00 AM KST) is Hong Kong 9:00 AM — clean start-of-day on both sides. Korean 5:00 PM KST is Hong Kong 4:00 PM — workable for end-of-day signoffs.
Which countries or regions use KST?
KST covers South Korea. Major cities include Seoul, Busan, Incheon, Daegu, Daejeon and Gwangju. South Korea shares its UTC+9 offset with Japan (JST), so Seoul and Tokyo clocks always match.
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), so many East Asian and ASEAN partners read the same clock.
Pro Tips
- • HKT is 1 hour behind KST — subtract 1 hour from Seoul, Busan or Incheon time to get Hong Kong time.
- • Neither side observes DST, so the 1-hour offset is permanent year-round.
- • Workdays overlap almost entirely — schedule freely across the Korea-Hong Kong band.
- • No date shifts ever apply between South Korea and Hong Kong.
- • Japan uses the same UTC+9 offset as South Korea — Tokyo to Hong Kong reads identically to Seoul to Hong Kong.
- • Use IANA identifiers Asia/Seoul and Asia/Hong_Kong in calendars for stable scheduling.