CET to HST
-11hCET
CETSOURCEHST
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
CET and HST on the World Map
The map below highlights the CET (Central European Time) and HST (Hawaii Standard Time) timezone regions across the globe.
CET – Central European Time
UTC+01:00Central European Time (CET) is used across most of Western and Central Europe, 1 hour ahead of UTC.
- •CET covers more European countries than any other time zone.
- •Spain uses CET despite being geographically aligned with GMT/WET.
- •The Frankfurt Stock Exchange, Euronext (Amsterdam/Paris), and Borsa Italiana operate on CET.
- •Over 500 million people live in the CET time zone.
- •France moved to CET during the German occupation in WWII and never switched back.
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).
Comparing Time Zones: CET and HST
CET runs on Central European Time (CET) at UTC+01:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts CET 11 hours behind HST — a difference of -11h at the current offsets.
In practice, when it is 9:00 AM in CET it is 10:00 PM in HST on the previous day. Midnight in CET is 1:00 PM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CET to HST time conversion table
| CET (CET) | HST (HST) | Day |
|---|---|---|
| 12:00 AM | 1:00 PM | previous day |
| 6:00 AM | 7:00 PM | previous day |
| 7:00 AM | 8:00 PM | previous day |
| 8:00 AM | 9:00 PM | previous day |
| 9:00 AM | 10:00 PM | previous day |
| 12:00 PM | 1:00 AM | same day |
| 3:00 PM | 4:00 AM | same day |
| 5:00 PM | 6:00 AM | same day |
| 6:00 PM | 7:00 AM | same day |
| 9:00 PM | 10:00 AM | same day |
Why people convert CET to HST time
- Scheduling a call from CET to HST: a 10:00 AM start in CET lands at 11:00 PM in HST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -11h gap: CET 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 10:00 PM in CET.
- Keeping family and friends in sync: knowing that 8:00 PM in CET is 9:00 AM in HST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM CET" is unambiguous; "3 PM" across a -11h gap is not.
- With a -11h gap there is no shared 9-to-5 window, so alternate the early start: one week CET takes the early slot, the next week HST does.
About CET (Central European Time)
Central European Time (CET) is the standard time zone for most of Europe, covering over 30 countries from Spain to Poland, and from Norway to Italy. CET is 1 hour ahead of GMT and is used by the European Union's most populous nations. During summer, most CET countries switch to Central European Summer Time (CEST, UTC+02:00). Major European financial markets in Frankfurt, Paris, and Amsterdam operate on CET.
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 CET and HST
With a -11h offset there is no overlap inside a normal 9 AM – 5 PM day. HST opens at 9:00 AM HST, which is 10:00 PM in CET, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
CET and HST have no shared working hours because of the -11h gap. Teams need to alternate early starts or rely on asynchronous handovers.
CET is 11 hours behind HST (CET UTC+01:00 → 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.
🕐 Daylight Saving Time Info
CET
☀ Currently in DST
Standard: UTC+01:00 · DST: UTC+02:00
Clocks fall back on Sun, Oct 25, 2026
HST
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 CET and HST?
CET (CET, UTC+01:00) is 11 hours behind HST (HST, UTC-10:00). The gap is currently -11h.
How do I convert CET time to HST time?
Add -11h to CET local time. For example, 9:00 AM in CET is 10:00 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 -11h offset from CET.
What is the best time to call HST from CET?
There is no shared working-hours window because of the -11h gap. The closest option is 1:00 PM in CET, which is 2:00 AM in HST.
Which is behind, CET or HST?
CET is 11 hours behind HST. When it is 12:00 PM in CET it is 1:00 AM in HST.
Does daylight saving time affect the CET–HST difference?
Neither zone observes daylight saving time, so the -11h offset between CET and HST is fixed all year.
Which other cities share CET's time zone?
CET also covers Paris, Berlin, Rome, Madrid, Amsterdam, Brussels, Vienna, Warsaw and 10 more.
Which countries use CET, CET's zone?
CET is used in Germany, France, Italy, Spain, Netherlands, Belgium, Austria, Switzerland and 19 more.
Is there a day difference between CET and HST?
Not normally. The -11h gap only pushes the date over the previous day.
What is the time difference between CET and HST?
HST is -11h from CET.
What timezone is CET in?
CET operates on its local timezone.
What timezone is HST in?
HST operates on its local timezone.
Which countries use CET (Central European Time)?
CET is used in Germany, France, Italy, Spain, Netherlands, Belgium, and 21 more countries.
Does CET observe daylight saving time?
Yes, CET switches to CEST during summer months.
What are some interesting facts about CET?
CET covers more European countries than any other time zone. Spain uses CET despite being geographically aligned with GMT/WET.
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 CET, what time is it in HST?
When it is 12:00 AM (midnight) in CET (CET), it is -11h later in HST (HST).
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See every conversion from CET →·See every conversion from HST →