CEST to HST
-12hCEST
CESTSOURCEHST
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
CEST and HST on the World Map
The map below highlights the CEST (Central European Summer Time) and HST (Hawaii Standard Time) timezone regions across the globe.
CEST – Central European Summer Time
UTC+02:00Central European Summer Time (CEST) is the daylight saving time in Central Europe, 2 hours ahead of UTC.
- •CEST runs from the last Sunday of March to the last Sunday of October.
- •The EU has voted to abolish clock changes but implementation has been delayed.
- •CEST shares the same offset as EET (UTC+02:00).
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).
CEST vs HST: Offsets, DST and Best Call Times
CEST runs on Central European Summer Time (CEST) at UTC+02:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts CEST 12 hours behind HST — a difference of -12h at the current offsets.
In practice, when it is 9:00 AM in CEST it is 9:00 PM in HST on the previous day. Midnight in CEST is 12:00 PM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CEST to HST time conversion table
| CEST (CEST) | HST (HST) | Day |
|---|---|---|
| 12:00 AM | 12:00 PM | previous day |
| 6:00 AM | 6:00 PM | previous day |
| 7:00 AM | 7:00 PM | previous day |
| 8:00 AM | 8:00 PM | previous day |
| 9:00 AM | 9:00 PM | previous day |
| 12:00 PM | 12:00 AM | same day |
| 3:00 PM | 3:00 AM | same day |
| 5:00 PM | 5:00 AM | same day |
| 6:00 PM | 6:00 AM | same day |
| 9:00 PM | 9:00 AM | same day |
Why people convert CEST to HST time
- Scheduling a call from CEST to HST: a 10:00 AM start in CEST lands at 10:00 PM in HST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -12h gap: CEST 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 9:00 PM in CEST.
- Keeping family and friends in sync: knowing that 8:00 PM in CEST is 8:00 AM in HST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM CEST" is unambiguous; "3 PM" across a -12h gap is not.
- With a -12h gap there is no shared 9-to-5 window, so alternate the early start: one week CEST takes the early slot, the next week HST does.
About CEST (Central European Summer Time)
Central European Summer Time (CEST) is observed from the last Sunday of March to the last Sunday of October across most of Europe. During CEST, clocks are 2 hours ahead of UTC. The EU has debated abolishing seasonal clock changes since 2019.
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 CEST and HST
With a -12h offset there is no overlap inside a normal 9 AM – 5 PM day. HST opens at 9:00 AM HST, which is 9:00 PM in CEST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
CEST and HST have no shared working hours because of the -12h gap. Teams need to alternate early starts or rely on asynchronous handovers.
CEST is 12 hours behind HST (CEST UTC+02:00 → 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
CEST
☀ 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 CEST and HST?
CEST (CEST, UTC+02:00) is 12 hours behind HST (HST, UTC-10:00). The gap is currently -12h.
How do I convert CEST time to HST time?
Add -12h to CEST local time. For example, 9:00 AM in CEST is 9:00 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 -12h offset from CEST.
What is the best time to call HST from CEST?
There is no shared working-hours window because of the -12h gap. The closest option is 1:00 PM in CEST, which is 1:00 AM in HST.
Which is behind, CEST or HST?
CEST is 12 hours behind HST. When it is 12:00 PM in CEST it is 12:00 AM in HST.
Does daylight saving time affect the CEST–HST difference?
Neither zone observes daylight saving time, so the -12h offset between CEST and HST is fixed all year.
Which other cities share CEST's time zone?
CEST also covers Paris, Berlin, Rome, Madrid, Amsterdam, Vienna, Stockholm.
Which countries use CEST, CEST's zone?
CEST is used in Germany, France, Italy, Spain, Netherlands, Belgium, Austria, Switzerland and 3 more.
Is there a day difference between CEST and HST?
Sometimes. The -12h gap is large enough that 8:00 PM or later in CEST already falls on the in HST.
What is the time difference between CEST and HST?
HST is -12h from CEST.
What timezone is CEST in?
CEST operates on its local timezone.
What timezone is HST in?
HST operates on its local timezone.
Which countries use CEST (Central European Summer Time)?
CEST is used in Germany, France, Italy, Spain, Netherlands, Belgium, and 5 more countries.
Does CEST observe daylight saving time?
Yes, CEST switches to CET during summer months.
What are some interesting facts about CEST?
CEST runs from the last Sunday of March to the last Sunday of October. The EU has voted to abolish clock changes but implementation has been delayed.
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 CEST, what time is it in HST?
When it is 12:00 AM (midnight) in CEST (CEST), it is -12h later in HST (HST).
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See every conversion from CEST →·See every conversion from HST →