Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

CET to Tehran

+2h 30m

CET

CETSOURCE

UTC+02:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Tehran

IRST

Iran · UTC+03:30

HH02

MM30

14:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

CET

Tehran

12:00 AM

1:30 AM

2:00 AM

3:30 AM

4:00 AM

5:30 AM

6:00 AM

7:30 AM

8:00 AM

9:30 AM

10:00 AM

11:30 AM

12:00 PM

1:30 PM

2:00 PM

3:30 PM

4:00 PM

5:30 PM

6:00 PM

7:30 PM

8:00 PM

9:30 PM

10:00 PM

11:30 PM

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

CET and IRST on the World Map

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

CET Zone

→

IRST 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

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key Facts about IRST

•IRST is one of only a few time zones with a 30-minute offset.
•Iran observes daylight saving time, switching to IRDT (UTC+04:30).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

About Tehran

Wikipedia

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

Population:9.4 million

Metro:16.8 million

Business Hours:8:00 AM - 4:00 PM IRST

Currency:IRR (﷼)

Stock Exchange:TSE (Tehran Stock Exchange)

Key Landmarks

Azadi TowerGolestan PalaceGrand BazaarMilad TowerTabiat Bridge

Did You Know?

Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).

Learn more about IRST timezone →

Understanding the +2h 30m Gap: CET vs Tehran

CET runs on Central European Time (CET) at UTC+01:00. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts CET 2 hours 30 minutes ahead of Tehran — a difference of +2h 30m at the current offsets.

In practice, when it is 9:00 AM in CET it is 11:30 AM in Tehran. Midnight in CET is 2:30 AM in Tehran. Neither zone observes daylight saving time, so the offset between them stays constant all year.

CET to Tehran time conversion table

CET (CET)	Tehran (IRST)	Day
12:00 AM	2:30 AM	same day
6:00 AM	8:30 AM	same day
7:00 AM	9:30 AM	same day
8:00 AM	10:30 AM	same day
9:00 AM	11:30 AM	same day
12:00 PM	2:30 PM	same day
3:00 PM	5:30 PM	same day
5:00 PM	7:30 PM	same day
6:00 PM	8:30 PM	same day
9:00 PM	11:30 PM	same day

Why people convert CET to Tehran time

Scheduling a call from CET to Tehran: a 10:00 AM start in CET lands at 12:30 PM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both CET and Tehran are inside the 9-to-5 working day between 9:00 AM and 2:30 PM CET time (11:30 AM–5:00 PM IRST). That is roughly 5 hours 30 minutes of usable overlap.
Booking travel or deliveries: tracking Tehran local time against CET keeps pickup windows and arrival estimates honest across the +2h 30m offset.

Always state the zone abbreviation, not just the hour. "3:00 PM CET" is unambiguous; "3 PM" across a +2h 30m gap is not.
Block 9:00 AM–2:30 PM CET as the recurring meeting window if you work primarily from CET and need Tehran colleagues present.

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 IRST (Iran Standard Time)

Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.

Best time to call between CET and Tehran

Both CET and Tehran sit inside the 9 AM – 5 PM working day between 9:00 AM–2:30 PM CET, which is 11:30 AM–5:00 PM IRST. That gives roughly 5 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

CET and Tehran share 5 hours of working-hours overlap (9:00 AM–2:30 PM CET), so scheduling a live meeting is straightforward.

CET is 2 hours 30 minutes ahead of Tehran (CET UTC+01:00 → IRST UTC+03:30). The shared working window is 9:00 AM–2:30 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

Tehran

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 CET and Tehran?

CET (CET, UTC+01:00) is 2 hours 30 minutes ahead of Tehran (IRST, UTC+03:30). The gap is currently +2h 30m.

How do I convert CET time to Tehran time?

Add +2h 30m to CET local time. For example, 9:00 AM in CET is 11:30 AM in Tehran.

What time is it in Tehran right now?

Tehran uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h 30m offset from CET.

What is the best time to call Tehran from CET?

Call between 9:00 AM and 2:30 PM CET — that maps to 11:30 AM–5:00 PM IRST and keeps both parties inside the working day.

Which is ahead, CET or Tehran?

CET is 2 hours 30 minutes ahead of Tehran. When it is 12:00 PM in CET it is 2:30 PM in Tehran.

Do CET and Tehran use different time zones?

CET uses CET at UTC+01:00, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are Europe/Paris and Asia/Tehran.

Does daylight saving time affect the CET–Tehran difference?

Neither zone observes daylight saving time, so the +2h 30m offset between CET and Tehran is fixed all year.

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 Tehran?

Not normally. The +2h 30m gap only pushes the date over for late-evening times.

What is the time difference between CET and Tehran?

Tehran is +2h 30m from CET.

What timezone is CET in?

CET operates on its local timezone.

What timezone is Tehran in?

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.