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).

CET to Vienna

+1h

CET

CETSOURCE

UTC+02:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Vienna

CEST

Austria · UTC+02:00☀ DST active

HH01

MM00

13:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

CET

Vienna

12:00 AM

2:00 AM

4:00 AM

6:00 AM

8:00 AM

10:00 AM

12:00 PM

2:00 PM

4:00 PM

6:00 PM

8:00 PM

10:00 PM

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

CET and CEST on the World Map

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

CET Zone

→

CEST 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

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

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

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 →

Comparing Time Zones: CET and Vienna

CET runs on Central European Time (CET) at UTC+01:00. Vienna runs on Central European Summer Time (CEST) at UTC+02:00, also currently on daylight saving time. That puts CET 1 hour ahead of Vienna — a difference of +1h at the current offsets.

In practice, when it is 9:00 AM in CET it is 10:00 AM in Vienna. Midnight in CET is 1:00 AM in Vienna.Vienna observes daylight saving time while CET does not, so the gap narrows or widens by an hour part of the year.

CET to Vienna time conversion table

CET (CET)	Vienna (CEST)	Day
12:00 AM	1:00 AM	same day
6:00 AM	7:00 AM	same day
7:00 AM	8:00 AM	same day
8:00 AM	9:00 AM	same day
9:00 AM	10:00 AM	same day
12:00 PM	1:00 PM	same day
3:00 PM	4:00 PM	same day
5:00 PM	6:00 PM	same day
6:00 PM	7:00 PM	same day
9:00 PM	10:00 PM	same day

Why people convert CET to Vienna time

Scheduling a call from CET to Vienna: a 10:00 AM start in CET lands at 11:00 AM in Vienna, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both CET and Vienna are inside the 9-to-5 working day between 9:00 AM and 4:00 PM CET time (10:00 AM–5:00 PM CEST). That is roughly 7 hours of usable overlap.
Watching a live event or market open: CET viewers need 10:00 AM in Vienna to catch a 9:00 AM start there, and 11:00 PM if the event is anchored to CET.

Always state the zone abbreviation, not just the hour. "3:00 PM CET" is unambiguous; "3 PM" across a +1h gap is not.
Block 9:00 AM–4:00 PM CET as the recurring meeting window if you work primarily from CET and need Vienna colleagues present.
Vienna: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.

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 CET (Central European Time)

Best time to call between CET and Vienna

Both CET and Vienna sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM CET, which is 10:00 AM–5:00 PM CEST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

CET and Vienna share 7 hours of working-hours overlap (9:00 AM–4:00 PM CET), so scheduling a live meeting is straightforward.

CET is 1 hour ahead of Vienna (CET UTC+01:00 → CEST UTC+02:00). The shared working window is 9:00 AM–4:00 PM CET. 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

Vienna

☀ Currently in DST

Standard: UTC+01:00 · DST: UTC+02:00

Clocks fall back on Sun, Oct 25, 2026

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 CET and Vienna?

CET (CET, UTC+01:00) is 1 hour ahead of Vienna (CEST, UTC+02:00). The gap is currently +1h.

How do I convert CET time to Vienna time?

Add +1h to CET local time. For example, 9:00 AM in CET is 10:00 AM in Vienna.

What time is it in Vienna right now?

Vienna uses CEST at UTC+02:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from CET.

What is the best time to call Vienna from CET?

Call between 9:00 AM and 4:00 PM CET — that maps to 10:00 AM–5:00 PM CEST and keeps both parties inside the working day.

Which is ahead, CET or Vienna?

CET is 1 hour ahead of Vienna. When it is 12:00 PM in CET it is 1:00 PM in Vienna.

Do CET and Vienna use different time zones?

CET uses CET at UTC+01:00, while Vienna (Austria) uses CEST at UTC+02:00. The IANA identifiers are Europe/Paris and Europe/Vienna.

Does daylight saving time affect the CET–Vienna difference?

Yes at the moment: Vienna is on daylight saving time and CET is not, so the +1h gap shifts by an hour when exactly one of them changes clocks.

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 Vienna?

Not normally. The +1h gap only pushes the date over for late-evening times.

What is the time difference between CET and Vienna?

Vienna is +1h from CET.

What timezone is CET in?

CET operates on its local timezone.

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.