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 Helsinki

-0h 30m

Tehran

IRSTSOURCE

Iran · UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Helsinki

EEST

Finland · UTC+03:00☀ DST active

HH11

MM30

11:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Tehran

Helsinki

12:00 AM

11:30 PM-1

2:00 AM

1:30 AM

4:00 AM

3:30 AM

6:00 AM

5:30 AM

8:00 AM

7:30 AM

10:00 AM

9:30 AM

12:00 PM

11:30 AM

2:00 PM

1:30 PM

4:00 PM

3:30 PM

6:00 PM

5:30 PM

8:00 PM

7:30 PM

10:00 PM

9:30 PM

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

IRST and EEST on the World Map

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

IRST Zone

→

EEST 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

EET – Eastern European Time

UTC+02:00

Eastern European Time (EET) is used in Eastern Europe, the Middle East, and northeastern Africa, 2 hours ahead of UTC.

Countries in EET

FinlandGreeceRomaniaBulgariaUkraineEgyptIsraelLebanonJordanLithuaniaLatviaEstoniaMoldovaLibyaSyriaPalestineCyprus

Major Cities in EET

CairoAthensHelsinkiBucharestKyivSofiaJerusalemTel AvivBeirutVilniusRigaTallinn

Key Facts about EET

•EET covers countries across three continents: Europe, Asia, and Africa.
•Cairo is the most populous city in the EET zone.
•Turkey used to be on EET but permanently moved to UTC+03:00 in 2016.
•Finland, the Baltic states, and Greece all use EET.

Daylight Saving:Yes – switches to EEST

Learn more about EET 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 →

About Helsinki

Wikipedia

Helsinki operates on Eastern European Time (EET/EEST), UTC+2. As a global gaming and design hub, Helsinki coordinates with EU and Russian markets.

Population:656,000

Metro:1.5 million

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

Currency:EUR (€)

Stock Exchange:Nasdaq Helsinki

Key Landmarks

Helsinki CathedralSuomenlinna FortressTemppeliaukio ChurchMarket SquareDesign District

Did You Know?

Finland has been ranked the world's happiest country for several consecutive years.

Learn more about EEST timezone →

Comparing Time Zones: Tehran and Helsinki

Tehran runs on Iran Standard Time (IRST) at UTC+03:30. Helsinki runs on Eastern European Summer Time (EEST) at UTC+03:00, also currently on daylight saving time. That puts Tehran 30 minutes behind Helsinki — a difference of -0h 30m at the current offsets.

In practice, when it is 9:00 AM in Tehran it is 8:30 AM in Helsinki. Midnight in Tehran is 11:30 PM in Helsinki.Helsinki observes daylight saving time while Tehran does not, so the gap narrows or widens by an hour part of the year.

Tehran to Helsinki time conversion table

Tehran (IRST)	Helsinki (EEST)	Day
12:00 AM	11:30 PM	previous day
6:00 AM	5:30 AM	same day
7:00 AM	6:30 AM	same day
8:00 AM	7:30 AM	same day
9:00 AM	8:30 AM	same day
12:00 PM	11:30 AM	same day
3:00 PM	2:30 PM	same day
5:00 PM	4:30 PM	same day
6:00 PM	5:30 PM	same day
9:00 PM	8:30 PM	same day

Why people convert Tehran to Helsinki time

Scheduling a call from Tehran to Helsinki: a 10:00 AM start in Tehran lands at 9:30 AM in Helsinki, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Tehran and Helsinki are inside the 9-to-5 working day between 9:30 AM and 5:00 PM IRST time (9:00 AM–4:30 PM EEST). That is roughly 7 hours 30 minutes of usable overlap.
Watching a live event or market open: Tehran viewers need 8:30 AM in Helsinki to catch a 9:00 AM start there, and 12:30 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 -0h 30m gap is not.
Block 9:30 AM–5:00 PM IRST as the recurring meeting window if you work primarily from Tehran and need Helsinki colleagues present.
Helsinki: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.

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 EET (Eastern European Time)

Eastern European Time (EET) covers a wide geographical area including Eastern Europe (Finland, Greece, Romania, Bulgaria, Ukraine), the Middle East (Israel, Lebanon, Jordan), and northeastern Africa (Egypt, Libya). During summer, most EET countries switch to Eastern European Summer Time (EEST, UTC+03:00). Turkey permanently moved to UTC+03:00 in 2016, effectively leaving EET.

Best time to call between Tehran and Helsinki

Both Tehran and Helsinki sit inside the 9 AM – 5 PM working day between 9:30 AM–5:00 PM IRST, which is 9:00 AM–4:30 PM EEST. That gives roughly 7 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Tehran and Helsinki share 7 hours of working-hours overlap (9:30 AM–5:00 PM IRST), so scheduling a live meeting is straightforward.

Tehran is 30 minutes behind Helsinki (IRST UTC+03:30 → EEST UTC+03:00). The shared working window is 9:30 AM–5:00 PM IRST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Tehran

Does not observe DST

Helsinki

☀ Currently in DST

Standard: UTC+02:00 · DST: UTC+03:00

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 Helsinki?

Tehran (IRST, UTC+03:30) is 30 minutes behind Helsinki (EEST, UTC+03:00). The gap is currently -0h 30m.

How do I convert Tehran time to Helsinki time?

Add -0h 30m to Tehran local time. For example, 9:00 AM in Tehran is 8:30 AM in Helsinki.

What time is it in Helsinki right now?

Helsinki uses EEST at UTC+03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -0h 30m offset from Tehran.

What is the best time to call Helsinki from Tehran?

Call between 9:30 AM and 5:00 PM IRST — that maps to 9:00 AM–4:30 PM EEST and keeps both parties inside the working day.

Which is behind, Tehran or Helsinki?

Tehran is 30 minutes behind Helsinki. When it is 12:00 PM in Tehran it is 11:30 AM in Helsinki.

Do Tehran and Helsinki use different time zones?

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

Does daylight saving time affect the Tehran–Helsinki difference?

Yes at the moment: Helsinki is on daylight saving time and Tehran is not, so the -0h 30m gap shifts by an hour when exactly one of them changes clocks.

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 Helsinki?

Not normally. The -0h 30m gap only pushes the date over the previous day.

What is the time difference between Tehran and Helsinki?

Helsinki is -0h 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.

What timezone is Helsinki in?

Helsinki operates on Eastern European Time (EET/EEST), UTC+2. As a global gaming and design hub, Helsinki coordinates with EU and Russian markets.

What are the business hours in Tehran?

Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.

What are the business hours in Helsinki?

Standard business hours in Helsinki are 8:00 AM - 4:00 PM EET.

What is the best time to schedule a call between Tehran and Helsinki?

The best overlap for a call is when both cities are in business hours. Tehran works 8:00 AM - 4:00 PM IRST and Helsinki works 8:00 AM - 4:00 PM EET (-0h 30m difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Tehran and Helsinki?

Tehran uses IRR (﷼) while Helsinki uses EUR (€). Check current exchange rates when planning travel or business between these cities.

How do Tehran and Helsinki compare in size?

Tehran has a population of approximately 9.4 million (metro: 16.8 million), while Helsinki has approximately 656,000 (metro: 1.5 million).

What are the major landmarks in Tehran and Helsinki?

Tehran is known for Azadi Tower, Golestan Palace, Grand Bazaar. Helsinki is famous for Helsinki Cathedral, Suomenlinna Fortress, Temppeliaukio Church.

Do Tehran and Helsinki have stock exchanges?

Yes. Tehran has the TSE (Tehran Stock Exchange) and Helsinki has the Nasdaq Helsinki. The -0h 30m time difference affects trading hour overlaps between these exchanges.