Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

Vienna to HKT

+6h

Vienna

CESTSOURCE

Austria · UTC+02:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

HKT

UTC+08:00

HH06

MM00

18:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Vienna

HKT

12:00 AM

6:00 AM

2:00 AM

8:00 AM

4:00 AM

10:00 AM

6:00 AM

12:00 PM

8:00 AM

2:00 PM

10:00 AM

4:00 PM

12:00 PM

6:00 PM

2:00 PM

8:00 PM

4:00 PM

10:00 PM

6:00 PM

12:00 AM+1

8:00 PM

2:00 AM+1

10:00 PM

4:00 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

CEST and HKT on the World Map

The map below highlights the CEST (Central European Time) and HKT (Hong Kong Time) timezone regions across the globe.

CEST Zone

→

HKT Zone

Explore all world timezones interactively →

CET – Central European Time

UTC+01:00

Central European Time (CET) is used across most of Western and Central Europe, 1 hour ahead of UTC.

Countries in CET

GermanyFranceItalySpainNetherlandsBelgiumAustriaSwitzerlandPolandCzech RepublicSwedenNorwayDenmarkHungaryCroatiaSerbiaSlovakiaSloveniaBosnia and HerzegovinaNorth MacedoniaAlbaniaMontenegroLuxembourgMaltaTunisiaAlgeriaNigeria

Major Cities in CET

ParisBerlinRomeMadridAmsterdamBrusselsViennaWarsawZurichStockholmOsloCopenhagenPragueBudapestBarcelonaMunichMilanLagos

Key Facts about CET

•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.

Daylight Saving:Yes – switches to CEST

Learn more about CET on Wikipedia

HKT – Hong Kong Time

UTC+08:00

Hong Kong Time (HKT, UTC+08:00) is the time zone for Hong Kong, 8 hours ahead of UTC.

Countries in HKT

Hong Kong SAR

Major Cities in HKT

Hong KongKowloonTsuen WanSha Tin

Key Facts about HKT

•Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979.
•HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.
•The Hong Kong Stock Exchange opens at 09:30 HKT.
•Hong Kong Time does not change with the seasons, so its gap to other zones is fixed.

Daylight Saving:No – UTC+08:00 year-round

Learn more about HKT on Wikipedia

About Vienna

Wikipedia

Vienna operates on Central European Time (CET/CEST). As a major EU hub and headquarters for international organizations, Vienna coordinates Central European business.

Population:1.9 million

Metro:2.9 million

Business Hours:8:00 AM - 5:00 PM CET

Currency:EUR (€)

Stock Exchange:Wiener Börse

Key Landmarks

Schönbrunn PalaceSt. Stephen's CathedralBelvedere PalaceHofburgVienna State Opera

Did You Know?

Vienna has more than 50 theaters and opera houses.

Learn more about CEST timezone →

Understanding the +6h Gap: Vienna vs HKT

Vienna runs on Central European Summer Time (CEST) at UTC+02:00, currently observing daylight saving time. HKT runs on Hong Kong Time (HKT) at UTC+08:00. That puts Vienna 6 hours ahead of HKT — a difference of +6h at the current offsets.

In practice, when it is 9:00 AM in Vienna it is 3:00 PM in HKT. Midnight in Vienna is 6:00 AM in HKT.Vienna observes daylight saving time while HKT does not, so the gap narrows or widens by an hour part of the year.

Vienna to HKT time conversion table

Vienna (CEST)	HKT (HKT)	Day
12:00 AM	6:00 AM	same day
6:00 AM	12:00 PM	same day
7:00 AM	1:00 PM	same day
8:00 AM	2:00 PM	same day
9:00 AM	3:00 PM	same day
12:00 PM	6:00 PM	same day
3:00 PM	9:00 PM	same day
5:00 PM	11:00 PM	same day
6:00 PM	12:00 AM	next day
9:00 PM	3:00 AM	next day

Why people convert Vienna to HKT time

Scheduling a call from Vienna to HKT: a 10:00 AM start in Vienna lands at 4:00 PM in HKT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Vienna and HKT are inside the 9-to-5 working day between 9:00 AM and 11:00 AM CEST time (3:00 PM–5:00 PM HKT). That is roughly 2 hours of usable overlap.
Coordinating a Vienna-based team with HKT contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM CEST" is unambiguous; "3 PM" across a +6h gap is not.
Block 9:00 AM–11:00 AM CEST as the recurring meeting window if you work primarily from Vienna and need HKT colleagues present.
Vienna: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +6h 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 HKT (Hong Kong Time)

Hong Kong Time (HKT) is fixed at UTC+08:00 all year and does not observe daylight saving time. Hong Kong last used summer time in 1979 and has kept a single offset since. HKT shares the UTC+08:00 offset with China Standard Time, Singapore Time, Malaysian Time, Philippine Time and Australian Western Standard Time, but is listed separately because Hong Kong maintains its own timekeeping authority. As a major financial centre, Hong Kong's trading hours set the rhythm for markets across Asia, opening at 09:30 HKT which is 01:30 in London and 20:30 the previous evening in New York.

Best time to call between Vienna and HKT

Both Vienna and HKT sit inside the 9 AM – 5 PM working day between 9:00 AM–11:00 AM CEST, which is 3:00 PM–5:00 PM HKT. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Vienna and HKT overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.

Vienna is 6 hours ahead of HKT (CEST UTC+02:00 → HKT UTC+08:00). The shared working window is 9:00 AM–11:00 AM CEST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Vienna

☀ Currently in DST

Standard: UTC+01:00 · DST: UTC+02:00

Clocks fall back on Sun, Oct 25, 2026

HKT

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:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Vienna and HKT?

Vienna (CEST, UTC+02:00) is 6 hours ahead of HKT (HKT, UTC+08:00). The gap is currently +6h.

How do I convert Vienna time to HKT time?

Add +6h to Vienna local time. For example, 9:00 AM in Vienna is 3:00 PM in HKT.

What time is it in HKT right now?

HKT uses HKT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +6h offset from Vienna.

What is the best time to call HKT from Vienna?

Call between 9:00 AM and 11:00 AM CEST — that maps to 3:00 PM–5:00 PM HKT and keeps both parties inside the working day.

Which is ahead, Vienna or HKT?

Vienna is 6 hours ahead of HKT. When it is 12:00 PM in Vienna it is 6:00 PM in HKT.

Do Vienna and HKT use different time zones?

Vienna (Austria) uses CEST at UTC+02:00, while HKT uses HKT at UTC+08:00. The IANA identifiers are Europe/Vienna and Asia/Hong_Kong.

Does daylight saving time affect the Vienna–HKT difference?

Yes at the moment: Vienna is on daylight saving time and HKT is not, so the +6h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Vienna's time zone?

CEST also covers Paris, Berlin, Rome, Madrid, Amsterdam, Brussels, Vienna, Warsaw and 10 more.

Which countries use CEST, Vienna's zone?

CEST is used in Germany, France, Italy, Spain, Netherlands, Belgium, Austria, Switzerland and 19 more.

Is there a day difference between Vienna and HKT?

Not normally. The +6h gap only pushes the date over for late-evening times.

What is the time difference between Vienna and HKT?

HKT is +6h from Vienna.

What timezone is Vienna in?

Vienna operates on Central European Time (CET/CEST). As a major EU hub and headquarters for international organizations, Vienna coordinates Central European business.

What timezone is HKT in?

HKT operates on its local timezone.

What are the business hours in Vienna?

Standard business hours in Vienna 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 HKT timezone?

Major cities in the HKT timezone include Hong Kong, Kowloon, Tsuen Wan, Sha Tin.

What is the UTC offset for HKT?

Hong Kong Time (HKT) is at UTC+08:00.

What should I know about the HKT timezone?

Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979. HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.