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 CAT

+0h

Vienna

CESTSOURCE

Austria · UTC+02:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

CAT

UTC+02:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Vienna

CAT

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)

CEST and CAT on the World Map

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

CEST Zone

→

CAT 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

CAT – Central Africa Time

UTC+02:00

Central Africa Time (CAT, UTC+02:00) covers Zimbabwe, Zambia, Mozambique, Malawi and neighbouring countries.

Countries in CAT

ZimbabweZambiaMozambiqueMalawiRwandaBurundiDR Congo (east)

Major Cities in CAT

HarareLusakaMaputoLilongweKigali

Key Facts about CAT

•Central Africa Time is fixed at UTC+02:00 with no daylight saving.
•CAT matches South Africa Standard Time (SAST) all year.
•It is the same offset as Central European Time in winter.
•Harare is level with Johannesburg and one hour ahead of Lagos.

Daylight Saving:No – UTC+02:00 year-round

Learn more about CAT 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: Vienna and CAT

Vienna runs on Central European Summer Time (CEST) at UTC+02:00, currently observing daylight saving time. CAT runs on Central Africa Time (CAT) at UTC+02:00. That puts Vienna no time difference CAT — a difference of +0h at the current offsets.

In practice, when it is 9:00 AM in Vienna it is 9:00 AM in CAT. Midnight in Vienna is 12:00 AM in CAT.Vienna observes daylight saving time while CAT does not, so the gap narrows or widens by an hour part of the year.

Vienna to CAT time conversion table

Vienna (CEST)	CAT (CAT)	Day
12:00 AM	12:00 AM	same day
6:00 AM	6:00 AM	same day
7:00 AM	7:00 AM	same day
8:00 AM	8:00 AM	same day
9:00 AM	9:00 AM	same day
12:00 PM	12:00 PM	same day
3:00 PM	3:00 PM	same day
5:00 PM	5:00 PM	same day
6:00 PM	6:00 PM	same day
9:00 PM	9:00 PM	same day

Why people convert Vienna to CAT time

Scheduling a call from Vienna to CAT: a 10:00 AM start in Vienna lands at 10:00 AM in CAT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Vienna and CAT are inside the 9-to-5 working day between 9:00 AM and 5:00 PM CEST time (9:00 AM–5:00 PM CAT). That is roughly 8 hours of usable overlap.
Watching a live event or market open: Vienna viewers need 9:00 AM in CAT to catch a 9:00 AM start there, and 12:00 AM if the event is anchored to Vienna.

Always state the zone abbreviation, not just the hour. "3:00 PM CEST" is unambiguous; "3 PM" across a +0h gap is not.
Block 9:00 AM–5:00 PM CEST as the recurring meeting window if you work primarily from Vienna and need CAT 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 +0h 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 CAT (Central Africa Time)

Central Africa Time (CAT) is fixed at UTC+02:00 all year across a broad belt of southern and central Africa, including Zimbabwe, Zambia, Mozambique, Malawi, Rwanda, Burundi and the eastern Democratic Republic of the Congo. None of these countries observes daylight saving time, so CAT never shifts. It is the same offset as South Africa Standard Time (SAST) and the winter version of Central European Time, which makes CAT a convenient bridge between African, European and Middle Eastern schedules — Harare is level with Johannesburg all year and one hour ahead of Lagos.

Best time to call between Vienna and CAT

Both Vienna and CAT sit inside the 9 AM – 5 PM working day between 9:00 AM–5:00 PM CEST, which is 9:00 AM–5:00 PM CAT. That gives roughly 8 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Vienna and CAT share 8 hours of working-hours overlap (9:00 AM–5:00 PM CEST), so scheduling a live meeting is straightforward.

Vienna is no time difference CAT (CEST UTC+02:00 → CAT UTC+02:00). The shared working window is 9:00 AM–5:00 PM 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

CAT

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 CAT?

Vienna (CEST, UTC+02:00) is no time difference CAT (CAT, UTC+02:00). The gap is currently +0h.

How do I convert Vienna time to CAT time?

Add +0h to Vienna local time. For example, 9:00 AM in Vienna is 9:00 AM in CAT.

What time is it in CAT right now?

CAT uses CAT at UTC+02:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +0h offset from Vienna.

What is the best time to call CAT from Vienna?

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

Which is ahead, Vienna or CAT?

Vienna and CAT are currently on the same clock.

Do Vienna and CAT use different time zones?

Vienna (Austria) uses CEST at UTC+02:00, while CAT uses CAT at UTC+02:00. The IANA identifiers are Europe/Vienna and Africa/Harare.

Does daylight saving time affect the Vienna–CAT difference?

Yes at the moment: Vienna is on daylight saving time and CAT is not, so the +0h 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.

What is the time difference between Vienna and CAT?

CAT is +0h 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.