IRST to ART
-6h 30mIRST
IRSTSOURCEART
ARTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and ART on the World Map
The map below highlights the IRST (Iran Standard Time) and ART (Argentina 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.
ART – Argentina Time
UTC-03:00Argentina Time (ART) is the standard time for Argentina, 3 hours behind UTC.
- •Argentina does not observe daylight saving time.
- •Buenos Aires is one of the most visited cities in South America.
- •ART is the same offset as BRT (UTC-03:00).
Everything You Need to Know About IRST and ART Time
IRST runs on Iran Standard Time (IRST) at UTC+03:30. ART runs on Argentina Time (ART) at UTC-03:00. That puts IRST 6 hours 30 minutes behind ART — a difference of -6h 30m at the current offsets.
In practice, when it is 9:00 AM in IRST it is 2:30 AM in ART. Midnight in IRST is 5:30 PM in ART. Neither zone observes daylight saving time, so the offset between them stays constant all year.
IRST to ART time conversion table
| IRST (IRST) | ART (ART) | Day |
|---|---|---|
| 12:00 AM | 5:30 PM | previous day |
| 6:00 AM | 11:30 PM | previous day |
| 7:00 AM | 12:30 AM | same day |
| 8:00 AM | 1:30 AM | same day |
| 9:00 AM | 2:30 AM | same day |
| 12:00 PM | 5:30 AM | same day |
| 3:00 PM | 8:30 AM | same day |
| 5:00 PM | 10:30 AM | same day |
| 6:00 PM | 11:30 AM | same day |
| 9:00 PM | 2:30 PM | same day |
Why people convert IRST to ART time
- Scheduling a call from IRST to ART: a 10:00 AM start in IRST lands at 3:30 AM in ART, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both IRST and ART are inside the 9-to-5 working day between 3:30 PM and 5:00 PM IRST time (9:00 AM–10:30 AM ART). That is roughly 1 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in IRST is 1:30 PM in ART 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 -6h 30m gap is not.
- Block 3:30 PM–5:00 PM IRST as the recurring meeting window if you work primarily from IRST and need ART 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 ART (Argentina Time)
Argentina Time (ART) is the time zone used throughout Argentina. Argentina does not observe daylight saving time. ART shares the same offset as Brasilia Time (BRT) and Uruguay's UYT.
Best time to call between IRST and ART
Both IRST and ART sit inside the 9 AM – 5 PM working day between 3:30 PM–5:00 PM IRST, which is 9:00 AM–10:30 AM ART. That gives roughly 1 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
IRST and ART overlap for only 90 minutes (3:30 PM–5:00 PM IRST), so meetings have to be booked precisely.
IRST is 6 hours 30 minutes behind ART (IRST UTC+03:30 → ART UTC-03:00). The shared working window is 3:30 PM–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 IRST and ART?
IRST (IRST, UTC+03:30) is 6 hours 30 minutes behind ART (ART, UTC-03:00). The gap is currently -6h 30m.
How do I convert IRST time to ART time?
Add -6h 30m to IRST local time. For example, 9:00 AM in IRST is 2:30 AM in ART.
What time is it in ART right now?
ART uses ART at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -6h 30m offset from IRST.
What is the best time to call ART from IRST?
Call between 3:30 PM and 5:00 PM IRST — that maps to 9:00 AM–10:30 AM ART and keeps both parties inside the working day.
Which is behind, IRST or ART?
IRST is 6 hours 30 minutes behind ART. When it is 12:00 PM in IRST it is 5:30 AM in ART.
Does daylight saving time affect the IRST–ART difference?
Neither zone observes daylight saving time, so the -6h 30m offset between IRST and ART is fixed all year.
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 ART?
Not normally. The -6h 30m gap only pushes the date over the previous day.
What is the time difference between IRST and ART?
ART is -6h 30m from IRST.
What timezone is IRST in?
IRST operates on its local timezone.
What timezone is ART in?
ART 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 ART timezone?
Major cities in the ART timezone include Buenos Aires, Córdoba, Rosario, Mendoza, La Plata, Tucumán.
What is the UTC offset for ART?
Argentina Time (ART) is at UTC-03:00.
What should I know about the ART timezone?
Argentina does not observe daylight saving time. Buenos Aires is one of the most visited cities in South America.
When is it midnight in IRST, what time is it in ART?
When it is 12:00 AM (midnight) in IRST (IRST), it is -6h 30m later in ART (ART).
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See every conversion from IRST →·See every conversion from ART →