HST to China
+18hHST
HSTSOURCEChina
CSTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and CST on the World Map
The map below highlights the HST (Hawaii Standard Time) and CST (China Standard Time) timezone regions across the globe.
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).
CST – China Standard Time
UTC+08:00China Standard Time (CST) covers all of mainland China, 8 hours ahead of UTC.
- •China uses a single time zone despite spanning 5 geographical zones.
- •In Xinjiang (western China), sunset can be as late as midnight in summer.
- •China abolished daylight saving time in 1991.
- •The Shanghai Stock Exchange operates on CST/Beijing Time.
Time Conversion Guide: HST to China
HST runs on Hawaii Standard Time (HST) at UTC-10:00. China runs on China Standard Time (CST) at UTC+08:00. That puts HST 18 hours ahead of China — a difference of +18h at the current offsets.
In practice, when it is 9:00 AM in HST it is 3:00 AM in China on the next day. Midnight in HST is 6:00 PM in China. Neither zone observes daylight saving time, so the offset between them stays constant all year.
HST to China time conversion table
| HST (HST) | China (CST) | Day |
|---|---|---|
| 12:00 AM | 6:00 PM | same day |
| 6:00 AM | 12:00 AM | next day |
| 7:00 AM | 1:00 AM | next day |
| 8:00 AM | 2:00 AM | next day |
| 9:00 AM | 3:00 AM | next day |
| 12:00 PM | 6:00 AM | next day |
| 3:00 PM | 9:00 AM | next day |
| 5:00 PM | 11:00 AM | next day |
| 6:00 PM | 12:00 PM | next day |
| 9:00 PM | 3:00 PM | next day |
Why people convert HST to China time
- Scheduling a call from HST to China: a 10:00 AM start in HST lands at 4:00 AM in China the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +18h gap: HST and China 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 China is 3:00 AM in HST.
- Watching a live event or market open: HST viewers need 3:00 AM in China to catch a 9:00 AM start there, and 6:00 AM if the event is anchored to HST.
- Always state the zone abbreviation, not just the hour. "3:00 PM HST" 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 HST takes the early slot, the next week China does.
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.
About CST (China Standard Time)
China Standard Time (CST, also known as Beijing Time) is used across all of mainland China despite the country spanning five geographical time zones. This single-timezone policy was adopted in 1949. China does not observe daylight saving time. CST is shared with Hong Kong (HKT), Macau, Taiwan, Singapore, Malaysia, and the Philippines, making UTC+08:00 one of the most used offsets in the world.
Best time to call between HST and China
With a +18h offset there is no overlap inside a normal 9 AM – 5 PM day. China opens at 9:00 AM CST, which is 3:00 AM in HST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
HST and China have no shared working hours because of the +18h gap. Teams need to alternate early starts or rely on asynchronous handovers.
HST is 18 hours ahead of China (HST UTC-10:00 → CST 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.
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 HST and China?
HST (HST, UTC-10:00) is 18 hours ahead of China (CST, UTC+08:00). The gap is currently +18h.
How do I convert HST time to China time?
Add +18h to HST local time. For example, 9:00 AM in HST is 3:00 AM in China (next day).
What time is it in China right now?
China uses CST at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +18h offset from HST.
What is the best time to call China from HST?
There is no shared working-hours window because of the +18h gap. The closest option is 1:00 PM in HST, which is 7:00 AM in China.
Which is ahead, HST or China?
HST is 18 hours ahead of China. When it is 12:00 PM in HST it is 6:00 AM in China.
Do HST and China use different time zones?
HST uses HST at UTC-10:00, while China (China) uses CST at UTC+08:00. The IANA identifiers are Pacific/Honolulu and Asia/Shanghai.
Does daylight saving time affect the HST–China difference?
Neither zone observes daylight saving time, so the +18h offset between HST and China is fixed all year.
Which other cities share HST's time zone?
HST also covers Honolulu, Hilo, Kailua, Pearl City, Kapolei.
Which countries use HST, HST's zone?
HST is used in United States (Hawaii).
Is there a day difference between HST and China?
Sometimes. The +18h gap is large enough that 8:00 PM or later in HST already falls on the next day in China.
What is the time difference between HST and China?
China is +18h from HST.
What timezone is HST in?
HST operates on its local timezone.
What timezone is China in?
China operates on its local timezone.
Which countries use HST (Hawaii Standard Time)?
HST is used in United States (Hawaii).
Does HST observe daylight saving time?
No, HST does not observe daylight saving time and remains at UTC-10:00 year-round.
What are some interesting facts about HST?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
Which cities are in the CST timezone?
Major cities in the CST timezone include Shanghai, Beijing, Shenzhen, Guangzhou, Chengdu, Hong Kong, Taipei, Wuhan.
What is the UTC offset for CST?
China Standard Time (CST) is at UTC+08:00.
What should I know about the CST timezone?
China uses a single time zone despite spanning 5 geographical zones. In Xinjiang (western China), sunset can be as late as midnight in summer.
When is it midnight in HST, what time is it in China?
When it is 12:00 AM (midnight) in HST (HST), it is +18h later in China (CST).
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