HST to CET Converter
Convert time between Hawaii-Aleutian Standard Time (HST) and Central European Time (CET)
Hawaii-Aleutian Standard Time (HST)
Central European Time (CET)
Time Difference
Central European Time (CET) is 0 hours ahead of Hawaii-Aleutian Standard Time (HST)
Select Date
Select Time
Quick Reference
| HST | CET |
|---|---|
| 16:00 | 03:00 |
| 18:00 | 05:00 |
| 20:00 | 07:00 |
| 22:00 | 09:00 |
| 00:00 | 11:00 |
| 02:00 | 13:00 |
| 04:00 | 15:00 |
| 06:00 | 17:00 |
| 08:00 | 19:00 |
| 10:00 | 21:00 |
| 12:00 | 23:00 |
| 14:00 | 01:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
Related Time Zone Conversions
About HST to CET Time Conversion
Converting time between Hawaii-Aleutian Standard Time (HST) and Central European Time (CET) involves an 11-hour difference. HST is UTC-10, while CET is UTC+1, making Central Europe 11 hours ahead of Hawaii during winter months.
CET is the standard/winter time for Central Europe, active from late October to late March. Hawaii does not observe daylight saving time, staying at UTC-10 year-round. During summer when Central Europe uses CEST (UTC+2), the difference increases to 12 hours.
Common Use Cases for HST to CET Conversion
Business & Work
- International business coordination between Hawaii and Central Europe
- Global IT companies with teams spanning Pacific and European regions
- Winter tourism coordination between Hawaii and European destinations
- Multinational corporations managing operations across these regions
Personal & Travel
- Coordinating with family and friends in Central Europe during winter
- Planning travel between Hawaii and CET countries
- Scheduling virtual meetings during the 11-hour time difference
- Managing international relationships across these distant regions
Time Zone Information
Hawaii-Aleutian Standard Time (HST)
- UTC Offset: UTC-10
- IANA Timezone: Pacific/Honolulu
- Daylight Saving: None - Hawaii does not observe daylight saving time
- Major Cities: Honolulu, Hilo, Kailua, Pearl City, Waipahu
- Coverage: Hawaii and the Aleutian Islands of Alaska
Central European Time (CET)
- UTC Offset: UTC+1
- IANA Timezone: Europe/Paris
- Daylight Saving: CEST (UTC+2) from late March to late October
- Major Cities: Paris, Berlin, Rome, Madrid, Amsterdam, Vienna, Prague, Warsaw
- Coverage: Central and Western Europe during winter/standard time
Quick Reference: HST to CET
CET is 11 hours ahead of HST during winter (late October to late March). When CEST begins (late March), the difference increases to 12 hours. Hawaii does not observe daylight saving time.
Frequently Asked Questions
What is the time difference between HST and CET?
Hawaii-Aleutian Standard Time (HST) is UTC-10, while Central European Time (CET) is UTC+1. This means CET is 11 hours ahead of HST. When it's 12:00 PM (noon) in Honolulu, it's 11:00 PM the same day in Paris or Berlin.
When is CET active?
Central European Time (CET) is the standard/winter time for Central Europe, active from the last Sunday in October to the last Sunday in March. During summer months (late March to late October), Central Europe uses CEST (UTC+2), making the difference with Hawaii 12 hours instead of 11.
Does Hawaii observe daylight saving time?
No, Hawaii does not observe daylight saving time. HST remains UTC-10 year-round. This means the time difference with Central Europe changes seasonally: 11 hours during CET (winter) and 12 hours during CEST (summer).
What are the best times for calls between Hawaii and Central Europe?
With an 11-hour gap, scheduling requires flexibility. Early morning in Hawaii (7-9 AM HST) corresponds to evening in CET (6-8 PM). Late evening in Hawaii (8-10 PM HST) aligns with morning in CET (7-9 AM next day). These windows offer the best overlap.
Which countries use CET?
CET is used during winter by most of Central and Western Europe including Germany, France, Italy, Spain, Netherlands, Belgium, Austria, Switzerland, Poland, Czech Republic, Hungary, and many more. These countries switch to CEST (UTC+2) during summer.
How does the date change work with an 11-hour difference?
Since CET is 11 hours ahead, after 1:00 PM HST it becomes the next calendar day in CET. For example, Monday 2:00 PM in Honolulu is Tuesday 1:00 AM in Paris. The date shift occurs at 1 PM Hawaii time during winter.
Pro Tips
- • The 11-hour winter difference means Hawaii morning (8-9 AM) overlaps with CET evening (7-8 PM) - ideal for end-of-day meetings.
- • Remember the difference increases to 12 hours when CEST begins (late March) and Central Europe moves to summer time.
- • Hawaii evening (9 PM HST) equals CET morning (8 AM next day) - good for urgent next-day handoffs.
- • Mark your calendar for the last Sundays of March and October when CET/CEST transitions occur.
- • For follow-the-sun workflows, Hawaii can review overnight work from Europe each morning.
- • Always specify both time AND date when scheduling - HST afternoon is already the next day in CET.
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