IRST to Bucharest
-0h 30mIRST
IRSTSOURCEBucharest
EESTGreen 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 – 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.
EET – Eastern European Time
UTC+02:00Eastern European Time (EET) is used in Eastern Europe, the Middle East, and northeastern Africa, 2 hours ahead of UTC.
- •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.
Everything You Need to Know About IRST and Bucharest Time
IRST runs on Iran Standard Time (IRST) at UTC+03:30. Bucharest runs on Eastern European Summer Time (EEST) at UTC+03:00, also currently on daylight saving time. That puts IRST 30 minutes behind Bucharest — a difference of -0h 30m at the current offsets.
In practice, when it is 9:00 AM in IRST it is 8:30 AM in Bucharest. Midnight in IRST is 11:30 PM in Bucharest.Bucharest observes daylight saving time while IRST does not, so the gap narrows or widens by an hour part of the year.
IRST to Bucharest time conversion table
| IRST (IRST) | Bucharest (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 IRST to Bucharest time
- Scheduling a call from IRST to Bucharest: a 10:00 AM start in IRST lands at 9:30 AM in Bucharest, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both IRST and Bucharest 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.
- Coordinating a IRST-based team with Bucharest 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 IRST and need Bucharest colleagues present.
- Bucharest: 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 IRST and Bucharest
Both IRST and Bucharest 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
IRST and Bucharest share 7 hours of working-hours overlap (9:30 AM–5:00 PM IRST), so scheduling a live meeting is straightforward.
IRST is 30 minutes behind Bucharest (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
IRST
Does not observe DST
Bucharest
☀ 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:
Frequently Asked Questions
What is the time difference between IRST and Bucharest?
IRST (IRST, UTC+03:30) is 30 minutes behind Bucharest (EEST, UTC+03:00). The gap is currently -0h 30m.
How do I convert IRST time to Bucharest time?
Add -0h 30m to IRST local time. For example, 9:00 AM in IRST is 8:30 AM in Bucharest.
What time is it in Bucharest right now?
Bucharest 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 IRST.
What is the best time to call Bucharest from IRST?
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, IRST or Bucharest?
IRST is 30 minutes behind Bucharest. When it is 12:00 PM in IRST it is 11:30 AM in Bucharest.
Do IRST and Bucharest use different time zones?
IRST uses IRST at UTC+03:30, while Bucharest (Romania) uses EEST at UTC+03:00. The IANA identifiers are Asia/Tehran and Europe/Bucharest.
Does daylight saving time affect the IRST–Bucharest difference?
Yes at the moment: Bucharest is on daylight saving time and IRST is not, so the -0h 30m gap shifts by an hour when exactly one of them changes clocks.
Which other cities share IRST's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, IRST's zone?
IRST is used in Iran.
Is there a day difference between IRST and Bucharest?
Not normally. The -0h 30m gap only pushes the date over the previous day.
What is the time difference between IRST and Bucharest?
Bucharest is -0h 30m from IRST.
What timezone is IRST in?
IRST operates on its local timezone.
What timezone is Bucharest in?
Bucharest 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 EET timezone?
Major cities in the EET timezone include Cairo, Athens, Helsinki, Bucharest, Kyiv, Sofia, Jerusalem, Tel Aviv.
What is the UTC offset for EET?
Eastern European Time (EET) is at UTC+02:00. During daylight saving time, it shifts to EEST.
What should I know about the EET timezone?
EET covers countries across three continents: Europe, Asia, and Africa. Cairo is the most populous city in the EET zone.
When is it midnight in IRST, what time is it in Bucharest?
When it is 12:00 AM (midnight) in IRST (IRST), it is -0h 30m later in Bucharest (EET).
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