Tehran to Addis Ababa
-0h 30mTehran
IRSTSOURCEAddis Ababa
EATGreen 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 – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •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.
EAT – East Africa Time
UTC+03:00East Africa Time (EAT) is the time zone for East Africa, 3 hours ahead of UTC.
- •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).
About Tehran
WikipediaTehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).
Comparing Time Zones: Tehran and Addis Ababa
Tehran runs on Iran Standard Time (IRST) at UTC+03:30. Addis Ababa runs on East Africa Time (EAT) at UTC+03:00. That puts Tehran 30 minutes behind Addis Ababa — 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 Addis Ababa. Midnight in Tehran is 11:30 PM in Addis Ababa. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Tehran to Addis Ababa time conversion table
| Tehran (IRST) | Addis Ababa (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 Tehran to Addis Ababa time
- Scheduling a call from Tehran to Addis Ababa: a 10:00 AM start in Tehran lands at 9:30 AM in Addis Ababa, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Tehran and Addis Ababa 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.
- Coordinating a Tehran-based team with Addis Ababa contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- 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 Addis Ababa 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 Tehran and Addis Ababa
Both Tehran and Addis Ababa 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
Tehran and Addis Ababa 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 Addis Ababa (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:
Frequently Asked Questions
What is the time difference between Tehran and Addis Ababa?
Tehran (IRST, UTC+03:30) is 30 minutes behind Addis Ababa (EAT, UTC+03:00). The gap is currently -0h 30m.
How do I convert Tehran time to Addis Ababa time?
Add -0h 30m to Tehran local time. For example, 9:00 AM in Tehran is 8:30 AM in Addis Ababa.
What time is it in Addis Ababa right now?
Addis Ababa 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 Tehran.
What is the best time to call Addis Ababa from Tehran?
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, Tehran or Addis Ababa?
Tehran is 30 minutes behind Addis Ababa. When it is 12:00 PM in Tehran it is 11:30 AM in Addis Ababa.
Do Tehran and Addis Ababa use different time zones?
Tehran (Iran) uses IRST at UTC+03:30, while Addis Ababa (Ethiopia) uses EAT at UTC+03:00. The IANA identifiers are Asia/Tehran and Africa/Addis_Ababa.
Does daylight saving time affect the Tehran–Addis Ababa difference?
Neither zone observes daylight saving time, so the -0h 30m offset between Tehran and Addis Ababa 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 Addis Ababa?
Not normally. The -0h 30m gap only pushes the date over the previous day.
What is the time difference between Tehran and Addis Ababa?
Addis Ababa 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 Addis Ababa in?
Addis Ababa operates on its local timezone.
What are the business hours in Tehran?
Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.
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.
When is it midnight in Tehran, what time is it in Addis Ababa?
When it is 12:00 AM (midnight) in Tehran (IRST), it is -0h 30m later in Addis Ababa (EAT).
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