ICT to HKT Converter
Convert time between Indochina Time (ICT) and Hong Kong Time (HKT)
Indochina Time (ICT)
Hong Kong Time (HKT)
Time Difference
Hong Kong Time (HKT) is 0 hours ahead of Indochina Time (ICT)
Select Date
Select Time
Quick Reference
| ICT | HKT |
|---|---|
| 09:00 | 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 |
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 ICT to HKT Time Conversion
Converting time between Indochina Time (ICT) and Hong Kong Time (HKT) is a steady 1-hour calculation. ICT is UTC+7, while HKT is UTC+8 year-round, so Hong Kong is always 1 hour ahead of Bangkok, Hanoi, Ho Chi Minh City, Phnom Penh and Vientiane. Neither side observes daylight saving time, so the offset never shifts.
This time zone converter uses the IANA timezone database (Asia/Bangkok and Asia/Hong_Kong) for accurate calculations. ICT covers Thailand, Vietnam, Cambodia and Laos — four of East Asia's most active trade and tourism partners. Whether you are scheduling Bangkok to Hong Kong meetings, planning regional travel or coordinating with Hong Kong teams from Southeast Asia, our converter delivers a simple year-round offset.
Common Use Cases for ICT to HKT Conversion
Business & Work
- Scheduling calls between Bangkok, Hanoi or Ho Chi Minh City and Hong Kong offices
- Coordinating manufacturing, logistics and trade workflows across Southeast Asia and Greater China
- Planning conference calls with Hong Kong partners from Cambodian, Lao or Vietnamese teams
Personal & Travel
- Planning travel from Thailand, Vietnam, Cambodia or Laos to Hong Kong
- Coordinating with family and friends in Hong Kong from Bangkok, Hanoi or Saigon
- Scheduling virtual events with Hong Kong-based contacts
Time Zone Information
Indochina Time (ICT)
- UTC Offset: UTC+7
- IANA Timezone: Asia/Bangkok
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Bangkok, Hanoi, Ho Chi Minh City, Phnom Penh, Vientiane
- Coverage: Thailand, Vietnam, Cambodia and Laos
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: ICT to HKT
Remember: HKT is 1 hour ahead of ICT, year-round. Neither Hong Kong nor the Indochina countries observe daylight saving, so the 1-hour offset never changes.
Frequently Asked Questions
What is the time difference between ICT and HKT?
Indochina Time (ICT) is UTC+7, while Hong Kong Time (HKT) is UTC+8. HKT is 1 hour ahead of ICT. When it is 12:00 PM in Bangkok, Hanoi or Ho Chi Minh City, it is 1:00 PM the same day in Hong Kong.
Does the offset change throughout the year?
No. Neither the Indochina countries (Thailand, Vietnam, Cambodia, Laos) nor Hong Kong observes daylight saving time. The 1-hour offset is permanent and never shifts.
How big is the working-day overlap?
Huge. With only a 1-hour gap and both sides on year-round fixed offsets, the entire standard Indochina workday (9:00 AM to 6:00 PM ICT) sits inside the Hong Kong workday (10:00 AM to 7:00 PM HKT). Schedule freely.
What are the best times for ICT-HKT business calls?
Anytime that suits both sides. Indochina morning (9:00 AM ICT) is Hong Kong 10:00 AM — clean start-of-day on both sides. Indochina 4:00 PM is Hong Kong 5:00 PM — workable for end-of-day signoffs.
Which countries or regions use ICT?
ICT covers Thailand, Vietnam, Cambodia and Laos. Major cities include Bangkok, Hanoi, Ho Chi Minh City, Phnom Penh and Vientiane. Western Indonesia (Java, Sumatra) also uses UTC+7 under the WIB name.
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 ahead of ICT — add 1 hour to Bangkok, Hanoi or Saigon 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 Indochina-Hong Kong band.
- • No date shifts ever apply between Indochina and Hong Kong.
- • Western Indonesia uses the same UTC+7 offset as ICT — the difference is administrative, not clock-based.
- • Use IANA identifiers Asia/Bangkok and Asia/Hong_Kong in calendars for stable scheduling.