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.

Tehran to CET

-2h 30m

Tehran

IRSTSOURCE

Iran · UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

CET

UTC+02:00☀ DST active

HH09

MM30

09:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Tehran

CET

12:00 AM

10:30 PM-1

2:00 AM

12:30 AM

4:00 AM

2:30 AM

6:00 AM

4:30 AM

8:00 AM

6:30 AM

10:00 AM

8:30 AM

12:00 PM

10:30 AM

2:00 PM

12:30 PM

4:00 PM

2:30 PM

6:00 PM

4:30 PM

8:00 PM

6:30 PM

10:00 PM

8:30 PM

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

IRST and CET on the World Map

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

IRST Zone

→

CET Zone

Explore all world timezones interactively →

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

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

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 →

Time Conversion Guide: Tehran to CET

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

In practice, when it is 9:00 AM in Tehran it is 6:30 AM in CET. Midnight in Tehran is 9:30 PM in CET. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Tehran to CET time conversion table

Tehran (IRST)	CET (CET)	Day
12:00 AM	9:30 PM	previous day
6:00 AM	3:30 AM	same day
7:00 AM	4:30 AM	same day
8:00 AM	5:30 AM	same day
9:00 AM	6:30 AM	same day
12:00 PM	9:30 AM	same day
3:00 PM	12:30 PM	same day
5:00 PM	2:30 PM	same day
6:00 PM	3:30 PM	same day
9:00 PM	6:30 PM	same day

Why people convert Tehran to CET time

Scheduling a call from Tehran to CET: a 10:00 AM start in Tehran lands at 7:30 AM in CET, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Tehran and CET are inside the 9-to-5 working day between 11:30 AM and 5:00 PM IRST time (9:00 AM–2:30 PM CET). That is roughly 5 hours 30 minutes of usable overlap.
Watching a live event or market open: Tehran viewers need 6:30 AM in CET to catch a 9:00 AM start there, and 2:30 AM if the event is anchored to Tehran.

Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a -2h 30m gap is not.
Block 11:30 AM–5:00 PM IRST as the recurring meeting window if you work primarily from Tehran and need CET colleagues present.

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.

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.

Best time to call between Tehran and CET

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

Business hours overlap

Tehran and CET share 5 hours of working-hours overlap (11:30 AM–5:00 PM IRST), so scheduling a live meeting is straightforward.

Tehran is 2 hours 30 minutes behind CET (IRST UTC+03:30 → CET UTC+01:00). The shared working window is 11:30 AM–5:00 PM IRST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Tehran

Does not observe DST

CET

☀ 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 Tehran and CET?

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

How do I convert Tehran time to CET time?

Add -2h 30m to Tehran local time. For example, 9:00 AM in Tehran is 6:30 AM in CET.

What time is it in CET right now?

CET uses CET at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h 30m offset from Tehran.

What is the best time to call CET from Tehran?

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

Which is behind, Tehran or CET?

Tehran is 2 hours 30 minutes behind CET. When it is 12:00 PM in Tehran it is 9:30 AM in CET.

Do Tehran and CET use different time zones?

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

Does daylight saving time affect the Tehran–CET difference?

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

Which other cities share Tehran's time zone?

IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.

Which countries use IRST, Tehran's zone?

IRST is used in Iran.

Is there a day difference between Tehran and CET?

Not normally. The -2h 30m gap only pushes the date over the previous day.

What is the time difference between Tehran and CET?

CET is -2h 30m from Tehran.

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.