Prague to HST
-12hPrague
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 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).
About Prague
WikipediaPrague operates on Central European Time (CET/CEST). As Central Europe's tourism and tech hub, Prague coordinates with major EU markets.
Czechia has the highest beer consumption per capita in the world.
Everything You Need to Know About Prague and HST Time
Prague runs on Central European Summer Time (CEST) at UTC+02:00, currently observing daylight saving time. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts Prague 12 hours behind HST — a difference of -12h at the current offsets.
In practice, when it is 9:00 AM in Prague it is 9:00 PM in HST on the previous day. Midnight in Prague is 12:00 PM in HST.Prague observes daylight saving time while HST does not, so the gap narrows or widens by an hour part of the year.
Prague to HST time conversion table
| Prague (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 Prague to HST time
- Scheduling a call from Prague to HST: a 10:00 AM start in Prague 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: Prague 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 Prague.
- Watching a live event or market open: Prague viewers need 9:00 PM in HST to catch a 9:00 AM start there, and 12:00 PM if the event is anchored to Prague.
- 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 Prague takes the early slot, the next week HST does.
- Prague: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the -12h gap.
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 Prague 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 Prague, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Prague and HST have no shared working hours because of the -12h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Prague 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
Prague
☀ 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 Prague and HST?
Prague (CEST, UTC+02:00) is 12 hours behind HST (HST, UTC-10:00). The gap is currently -12h.
How do I convert Prague time to HST time?
Add -12h to Prague local time. For example, 9:00 AM in Prague 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 Prague.
What is the best time to call HST from Prague?
There is no shared working-hours window because of the -12h gap. The closest option is 1:00 PM in Prague, which is 1:00 AM in HST.
Which is behind, Prague or HST?
Prague is 12 hours behind HST. When it is 12:00 PM in Prague it is 12:00 AM in HST.
Do Prague and HST use different time zones?
Prague (Czechia) uses CEST at UTC+02:00, while HST uses HST at UTC-10:00. The IANA identifiers are Europe/Prague and Pacific/Honolulu.
Does daylight saving time affect the Prague–HST difference?
Yes at the moment: Prague is on daylight saving time and HST is not, so the -12h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Prague's time zone?
CEST also covers Paris, Berlin, Rome, Madrid, Amsterdam, Brussels, Vienna, Warsaw and 10 more.
Which countries use CEST, Prague's zone?
CEST is used in Germany, France, Italy, Spain, Netherlands, Belgium, Austria, Switzerland and 19 more.
Is there a day difference between Prague and HST?
Sometimes. The -12h gap is large enough that 8:00 PM or later in Prague already falls on the in HST.
What is the time difference between Prague and HST?
HST is -12h from Prague.
What timezone is Prague in?
Prague operates on Central European Time (CET/CEST). As Central Europe's tourism and tech hub, Prague coordinates with major EU markets.
What timezone is HST in?
HST operates on its local timezone.
What are the business hours in Prague?
Standard business hours in Prague are 8:00 AM - 5:00 PM CET.
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 Prague, what time is it in HST?
When it is 12:00 AM (midnight) in Prague (CET), it is -12h later in HST (HST).
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