HKT to HST
-18hHKT
HKTSOURCEHST
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
HKT and HST on the World Map
The map below highlights the HKT (Hong Kong Time) and HST (Hawaii Standard Time) timezone regions across the globe.
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.
HST – Hawaii Standard Time
UTC-10:00Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.
- •Hawaii does not observe daylight saving time.
- •HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
- •Hawaii is one of only two US states that don't observe DST (the other is Arizona).
Time Conversion Guide: HKT to HST
HKT runs on Hong Kong Time (HKT) at UTC+08:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts HKT 18 hours behind HST — a difference of -18h at the current offsets.
In practice, when it is 9:00 AM in HKT it is 3:00 PM in HST on the previous day. Midnight in HKT is 6:00 AM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
HKT to HST time conversion table
| HKT (HKT) | HST (HST) | Day |
|---|---|---|
| 12:00 AM | 6:00 AM | previous day |
| 6:00 AM | 12:00 PM | previous day |
| 7:00 AM | 1:00 PM | previous day |
| 8:00 AM | 2:00 PM | previous day |
| 9:00 AM | 3:00 PM | previous day |
| 12:00 PM | 6:00 PM | previous day |
| 3:00 PM | 9:00 PM | previous day |
| 5:00 PM | 11:00 PM | previous day |
| 6:00 PM | 12:00 AM | same day |
| 9:00 PM | 3:00 AM | same day |
Why people convert HKT to HST time
- Scheduling a call from HKT to HST: a 10:00 AM start in HKT lands at 4:00 PM in HST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -18h gap: HKT and HST 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 HST is 3:00 PM in HKT.
- Keeping family and friends in sync: knowing that 8:00 PM in HKT is 2:00 AM in HST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM HKT" is unambiguous; "3 PM" across a -18h gap is not.
- With a -18h gap there is no shared 9-to-5 window, so alternate the early start: one week HKT takes the early slot, the next week HST does.
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.
About HST (Hawaii Standard Time)
Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.
Best time to call between HKT and HST
With a -18h offset there is no overlap inside a normal 9 AM – 5 PM day. HST opens at 9:00 AM HST, which is 3:00 PM in HKT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
HKT and HST have no shared working hours because of the -18h gap. Teams need to alternate early starts or rely on asynchronous handovers.
HKT is 18 hours behind HST (HKT UTC+08:00 → HST UTC-10:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
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 HKT and HST?
HKT (HKT, UTC+08:00) is 18 hours behind HST (HST, UTC-10:00). The gap is currently -18h.
How do I convert HKT time to HST time?
Add -18h to HKT local time. For example, 9:00 AM in HKT is 3:00 PM in HST (previous day).
What time is it in HST right now?
HST uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -18h offset from HKT.
What is the best time to call HST from HKT?
There is no shared working-hours window because of the -18h gap. The closest option is 1:00 PM in HKT, which is 7:00 PM in HST.
Which is behind, HKT or HST?
HKT is 18 hours behind HST. When it is 12:00 PM in HKT it is 6:00 PM in HST.
Does daylight saving time affect the HKT–HST difference?
Neither zone observes daylight saving time, so the -18h offset between HKT and HST is fixed all year.
Which other cities share HKT's time zone?
HKT also covers Hong Kong, Kowloon, Tsuen Wan, Sha Tin.
Which countries use HKT, HKT's zone?
HKT is used in Hong Kong SAR.
Is there a day difference between HKT and HST?
Sometimes. The -18h gap is large enough that 8:00 PM or later in HKT already falls on the in HST.
What is the time difference between HKT and HST?
HST is -18h from HKT.
What timezone is HKT in?
HKT operates on its local timezone.
What timezone is HST in?
HST operates on its local timezone.
Which countries use HKT (Hong Kong Time)?
HKT is used in Hong Kong SAR.
Does HKT observe daylight saving time?
No, HKT does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about HKT?
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.
Which cities are in the HST timezone?
Major cities in the HST timezone include Honolulu, Hilo, Kailua, Pearl City, Kapolei.
What is the UTC offset for HST?
Hawaii Standard Time (HST) is at UTC-10:00.
What should I know about the HST timezone?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
When is it midnight in HKT, what time is it in HST?
When it is 12:00 AM (midnight) in HKT (HKT), it is -18h later in HST (HST).
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See every conversion from HKT →·See every conversion from HST →