GMT to HKT
+8hGMT
GMTSOURCEHKT
HKTGreen rows indicate typical business hours (9 AM - 5 PM)
GMT and HKT on the World Map
The map below highlights the GMT (Greenwich Mean Time) and HKT (Hong Kong Time) timezone regions across the globe.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
HKT – Hong Kong Time
UTC+08:00Hong Kong Time (HKT, UTC+08:00) is the time zone for Hong Kong, 8 hours ahead of UTC.
- •Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979.
- •HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.
- •The Hong Kong Stock Exchange opens at 09:30 HKT.
- •Hong Kong Time does not change with the seasons, so its gap to other zones is fixed.
Comparing Time Zones: GMT and HKT
GMT runs on Greenwich Mean Time (GMT) at UTC+00:00. HKT runs on Hong Kong Time (HKT) at UTC+08:00. That puts GMT 8 hours ahead of HKT — a difference of +8h at the current offsets.
In practice, when it is 9:00 AM in GMT it is 5:00 PM in HKT. Midnight in GMT is 8:00 AM in HKT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
GMT to HKT time conversion table
| GMT (GMT) | HKT (HKT) | Day |
|---|---|---|
| 12:00 AM | 8:00 AM | same day |
| 6:00 AM | 2:00 PM | same day |
| 7:00 AM | 3:00 PM | same day |
| 8:00 AM | 4:00 PM | same day |
| 9:00 AM | 5:00 PM | same day |
| 12:00 PM | 8:00 PM | same day |
| 3:00 PM | 11:00 PM | same day |
| 5:00 PM | 1:00 AM | next day |
| 6:00 PM | 2:00 AM | next day |
| 9:00 PM | 5:00 AM | next day |
Why people convert GMT to HKT time
- Scheduling a call from GMT to HKT: a 10:00 AM start in GMT lands at 6:00 PM in HKT, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +8h gap: GMT and HKT have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in HKT is 5:00 PM in GMT.
- Watching a live event or market open: GMT viewers need 5:00 PM in HKT to catch a 9:00 AM start there, and 4:00 PM if the event is anchored to GMT.
- Always state the zone abbreviation, not just the hour. "3:00 PM GMT" is unambiguous; "3 PM" across a +8h gap is not.
- With a +8h gap there is no shared 9-to-5 window, so alternate the early start: one week GMT takes the early slot, the next week HKT does.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
About HKT (Hong Kong Time)
Hong Kong Time (HKT) is fixed at UTC+08:00 all year and does not observe daylight saving time. Hong Kong last used summer time in 1979 and has kept a single offset since. HKT shares the UTC+08:00 offset with China Standard Time, Singapore Time, Malaysian Time, Philippine Time and Australian Western Standard Time, but is listed separately because Hong Kong maintains its own timekeeping authority. As a major financial centre, Hong Kong's trading hours set the rhythm for markets across Asia, opening at 09:30 HKT which is 01:30 in London and 20:30 the previous evening in New York.
Best time to call between GMT and HKT
With a +8h offset there is no overlap inside a normal 9 AM – 5 PM day. HKT opens at 9:00 AM HKT, which is 5:00 PM in GMT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
GMT and HKT have no shared working hours because of the +8h gap. Teams need to alternate early starts or rely on asynchronous handovers.
GMT is 8 hours ahead of HKT (GMT UTC+00:00 → HKT UTC+08:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
GMT
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
HKT
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between GMT and HKT?
GMT (GMT, UTC+00:00) is 8 hours ahead of HKT (HKT, UTC+08:00). The gap is currently +8h.
How do I convert GMT time to HKT time?
Add +8h to GMT local time. For example, 9:00 AM in GMT is 5:00 PM in HKT.
What time is it in HKT right now?
HKT uses HKT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +8h offset from GMT.
What is the best time to call HKT from GMT?
There is no shared working-hours window because of the +8h gap. The closest option is 1:00 PM in GMT, which is 9:00 PM in HKT.
Which is ahead, GMT or HKT?
GMT is 8 hours ahead of HKT. When it is 12:00 PM in GMT it is 8:00 PM in HKT.
Does daylight saving time affect the GMT–HKT difference?
Neither zone observes daylight saving time, so the +8h offset between GMT and HKT is fixed all year.
Which other cities share GMT's time zone?
GMT also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.
Which countries use GMT, GMT's zone?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.
Is there a day difference between GMT and HKT?
Not normally. The +8h gap only pushes the date over for late-evening times.
What is the time difference between GMT and HKT?
HKT is +8h from GMT.
What timezone is GMT in?
GMT operates on its local timezone.
What timezone is HKT in?
HKT operates on its local timezone.
Which countries use GMT (Greenwich Mean Time)?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.
Does GMT observe daylight saving time?
Yes, GMT switches to BST during summer months.
What are some interesting facts about GMT?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
Which cities are in the HKT timezone?
Major cities in the HKT timezone include Hong Kong, Kowloon, Tsuen Wan, Sha Tin.
What is the UTC offset for HKT?
Hong Kong Time (HKT) is at UTC+08:00.
What should I know about the HKT timezone?
Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979. HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.
When is it midnight in GMT, what time is it in HKT?
When it is 12:00 AM (midnight) in GMT (GMT), it is +8h later in HKT (HKT).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More GMT time conversions
- gmt to london
- gmt to bst
- gmt to uk
- gmt to new york
- gmt to dubai
- gmt to tokyo
- gmt to singapore
- gmt to sydney
- gmt to los angeles
- gmt to paris
- gmt to delhi
- gmt to mumbai
- gmt to berlin
- gmt to hong kong
- gmt to toronto
- gmt to kathmandu
- new york to gmt
- london to gmt
- dubai to gmt
- tokyo to gmt
- singapore to gmt
- sydney to gmt
- los angeles to gmt
- paris to gmt
- delhi to gmt
- mumbai to gmt
- berlin to gmt
- hong kong to gmt
- toronto to gmt
- kathmandu to gmt
See every conversion from GMT →·See every conversion from HKT →