HKT to ICT Converter
Convert time between Hong Kong Time (HKT) and Indochina Time (ICT)
Hong Kong Time (HKT)
Indochina Time (ICT)
Time Difference
Indochina Time (ICT) is 0 hours ahead of Hong Kong Time (HKT)
Select Date
Select Time
Quick Reference
| HKT | ICT |
|---|---|
| 10:00 | 09:00 |
| 12:00 | 11:00 |
| 14:00 | 13:00 |
| 16:00 | 15:00 |
| 18:00 | 17:00 |
| 20:00 | 19:00 |
| 22:00 | 21:00 |
| 00:00 | 23:00 |
| 02:00 | 01:00 |
| 04:00 | 03:00 |
| 06:00 | 05:00 |
| 08:00 | 07:00 |
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 ICT Time Conversion
Converting time between Hong Kong Time (HKT) and Indochina Time (ICT) is a steady 1-hour calculation. HKT is UTC+8 year-round, while ICT is UTC+7, 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/Hong_Kong and Asia/Bangkok) 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 Hong Kong to Bangkok meetings, planning Southeast Asia travel or coordinating with regional teams, our converter delivers a simple year-round offset.
Common Use Cases for HKT to ICT Conversion
Business & Work
- Scheduling calls between Hong Kong and Bangkok, Hanoi or Ho Chi Minh City offices
- Coordinating manufacturing, logistics and trade workflows across Greater China and Southeast Asia
- Planning conference calls with Cambodian, Lao or Vietnamese partners
Personal & Travel
- Planning travel from Hong Kong to Thailand, Vietnam, Cambodia or Laos
- Coordinating with family and friends in Bangkok, Hanoi or Saigon
- Scheduling virtual events with Indochina-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
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
Quick Reference: HKT to ICT
Remember: ICT is 1 hour behind HKT, 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 HKT and ICT?
Hong Kong Time (HKT) is UTC+8, while Indochina Time (ICT) is UTC+7. ICT is 1 hour behind HKT, year-round. When it is 12:00 PM in Hong Kong, it is 11:00 AM in Bangkok, Hanoi or Ho Chi Minh City.
Does either side observe daylight saving time?
No. Hong Kong stays on HKT (UTC+8) year-round, and Thailand, Vietnam, Cambodia and Laos all stay on ICT (UTC+7) year-round. The 1-hour offset never changes, in either direction.
Is ICT the same as Vietnam, Cambodia and Laos time?
Yes. Vietnam, Cambodia and Laos all use ICT (UTC+7), the same offset as Thailand. Myanmar is 30 minutes behind on MMT (UTC+6:30), and the Philippines and Malaysia are an hour ahead on UTC+8 like Hong Kong.
What are the best times for HKT-ICT business calls?
Almost any working hour works. Hong Kong 10:00 AM to 6:00 PM HKT maps to ICT 9:00 AM to 5:00 PM — full workday overlap with both sides. Lunch breaks line up similarly (HKT noon = ICT 11:00 AM).
Which countries or regions use ICT?
ICT is used in Thailand, Vietnam, Cambodia and Laos. Major cities include Bangkok, Hanoi, Ho Chi Minh City (Saigon), Phnom Penh and Vientiane. The IANA identifier most commonly used is Asia/Bangkok, but Asia/Ho_Chi_Minh, Asia/Phnom_Penh and Asia/Vientiane all map to the same 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
- • ICT is 1 hour behind HKT — subtract 1 hour from Hong Kong time to get Bangkok or Hanoi time.
- • No DST on either side. The 1-hour offset is stable every day of the year.
- • Workdays overlap fully: HKT 10:00 AM to 6:00 PM = ICT 9:00 AM to 5:00 PM — easy live meeting window.
- • Myanmar (next door to Thailand) is 30 minutes behind ICT on MMT (UTC+6:30) — a 90-minute gap from Hong Kong.
- • Mainland China, Malaysia, the Philippines and Singapore share Hong Kong's UTC+8 offset — no shift to those countries.
- • Use IANA identifiers Asia/Hong_Kong and Asia/Bangkok in calendars so any future policy change is reflected automatically.