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).

Iran to EAT

-0h 30m

Iran

IRSTSOURCE

UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

EAT

UTC+03:00

HH11

MM30

11:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Iran

EAT

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 EAT on the World Map

The map below highlights the IRST (Iran Standard Time) and EAT (East Africa Time) timezone regions across the globe.

IRST Zone

→

EAT 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

EAT – East Africa Time

UTC+03:00

East Africa Time (EAT) is the time zone for East Africa, 3 hours ahead of UTC.

Countries in EAT

KenyaEthiopiaTanzaniaUgandaSomaliaMadagascarEritreaDjibouti

Major Cities in EAT

NairobiAddis AbabaDar es SalaamKampalaMogadishuAntananarivo

Key Facts about EAT

•Nairobi is a major tech hub in Africa, often called 'Silicon Savannah'.
•Ethiopia uses its own calendar, which is 7-8 years behind the Gregorian calendar.
•EAT is the same offset as MSK (Moscow Time).

Daylight Saving:No – UTC+03:00 year-round

Learn more about EAT on Wikipedia

Iran vs EAT: Offsets, DST and Best Call Times

Iran runs on Iran Standard Time (IRST) at UTC+03:30. EAT runs on East Africa Time (EAT) at UTC+03:00. That puts Iran 30 minutes behind EAT — a difference of -0h 30m at the current offsets.

In practice, when it is 9:00 AM in Iran it is 8:30 AM in EAT. Midnight in Iran is 11:30 PM in EAT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Iran to EAT time conversion table

Iran (IRST)	EAT (EAT)	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 Iran to EAT time

Scheduling a call from Iran to EAT: a 10:00 AM start in Iran lands at 9:30 AM in EAT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Iran and EAT are inside the 9-to-5 working day between 9:30 AM and 5:00 PM IRST time (9:00 AM–4:30 PM EAT). That is roughly 7 hours 30 minutes of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in Iran is 7:30 PM in EAT makes it easy to avoid calling at 3 AM.

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 Iran and need EAT 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 EAT (East Africa Time)

East Africa Time (EAT) is used in the countries of East Africa including Kenya, Ethiopia, Tanzania, Uganda, and others. EAT does not observe daylight saving time and shares the same offset as Moscow Standard Time (MSK).

Best time to call between Iran and EAT

Both Iran and EAT 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 EAT. That gives roughly 7 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

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

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

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 Iran and EAT?

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

How do I convert Iran time to EAT time?

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

What time is it in EAT right now?

EAT uses EAT 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 Iran.

What is the best time to call EAT from Iran?

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

Which is behind, Iran or EAT?

Iran is 30 minutes behind EAT. When it is 12:00 PM in Iran it is 11:30 AM in EAT.

Do Iran and EAT use different time zones?

Iran (Iran) uses IRST at UTC+03:30, while EAT uses EAT at UTC+03:00. The IANA identifiers are Asia/Tehran and Africa/Nairobi.

Does daylight saving time affect the Iran–EAT difference?

Neither zone observes daylight saving time, so the -0h 30m offset between Iran and EAT is fixed all year.

Which other cities share Iran's time zone?

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

Which countries use IRST, Iran's zone?

IRST is used in Iran.

Is there a day difference between Iran and EAT?

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

What is the time difference between Iran and EAT?

EAT is -0h 30m from Iran.

What timezone is Iran in?

Iran operates on its local timezone.

What timezone is EAT in?

EAT operates on its local timezone.

Which countries use IRST (Iran Standard Time)?

IRST is used in Iran.

Does IRST observe daylight saving time?

Yes, IRST switches to IRDT during summer months.

What are some interesting 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).

Which cities are in the EAT timezone?

Major cities in the EAT timezone include Nairobi, Addis Ababa, Dar es Salaam, Kampala, Mogadishu, Antananarivo.

What is the UTC offset for EAT?

East Africa Time (EAT) is at UTC+03:00.

What should I know about the EAT timezone?

Nairobi is a major tech hub in Africa, often called 'Silicon Savannah'. Ethiopia uses its own calendar, which is 7-8 years behind the Gregorian calendar.