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 Buenos Aires

-6h 30m

Tehran

IRSTSOURCE

Iran · UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Buenos Aires

ART

Argentina · UTC-03:00

HH05

MM30

05:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Tehran

Buenos Aires

12:00 AM

5:30 PM-1

2:00 AM

7:30 PM-1

4:00 AM

9:30 PM-1

6:00 AM

11:30 PM-1

8:00 AM

1:30 AM

10:00 AM

3:30 AM

12:00 PM

5:30 AM

2:00 PM

7:30 AM

4:00 PM

9:30 AM

6:00 PM

11:30 AM

8:00 PM

1:30 PM

10:00 PM

3:30 PM

Green 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 Zone

→

ART 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

ART – Argentina Time

UTC-03:00

Argentina Time (ART) is the standard time for Argentina, 3 hours behind UTC.

Countries in ART

Argentina

Major Cities in ART

Buenos AiresCórdobaRosarioMendozaLa PlataTucumán

Key Facts about ART

•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).

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

Learn more about ART 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 Buenos Aires

Wikipedia

Buenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.

Population:3 million

Metro:15.4 million

Business Hours:9:00 AM - 6:00 PM ART

Currency:ARS ($)

Stock Exchange:BCBA (Buenos Aires Stock Exchange)

Key Landmarks

Casa RosadaTeatro ColónLa BocaRecoleta CemeteryObelisco

Did You Know?

The Teatro Colón is considered one of the best opera houses in the world for acoustics.

Learn more about ART timezone →

Tehran to Buenos Aires Time Difference – Complete Guide

Tehran runs on Iran Standard Time (IRST) at UTC+03:30. Buenos Aires runs on Argentina Standard Time (ART) at UTC-03:00. That puts Tehran 6 hours 30 minutes behind Buenos Aires — a difference of -6h 30m at the current offsets.

In practice, when it is 9:00 AM in Tehran it is 2:30 AM in Buenos Aires. Midnight in Tehran is 5:30 PM in Buenos Aires. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Tehran to Buenos Aires time conversion table

Tehran (IRST)	Buenos Aires (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 Tehran to Buenos Aires time

Scheduling a call from Tehran to Buenos Aires: a 10:00 AM start in Tehran lands at 3:30 AM in Buenos Aires, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Tehran and Buenos Aires 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 Tehran is 1:30 PM in Buenos Aires 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 Tehran and need Buenos Aires 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 Tehran and Buenos Aires

Both Tehran and Buenos Aires 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

Tehran and Buenos Aires overlap for only 90 minutes (3:30 PM–5:00 PM IRST), so meetings have to be booked precisely.

Tehran is 6 hours 30 minutes behind Buenos Aires (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:

⏳

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 Buenos Aires?

Tehran (IRST, UTC+03:30) is 6 hours 30 minutes behind Buenos Aires (ART, UTC-03:00). The gap is currently -6h 30m.

How do I convert Tehran time to Buenos Aires time?

Add -6h 30m to Tehran local time. For example, 9:00 AM in Tehran is 2:30 AM in Buenos Aires.

What time is it in Buenos Aires right now?

Buenos Aires 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 Tehran.

What is the best time to call Buenos Aires from Tehran?

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, Tehran or Buenos Aires?

Tehran is 6 hours 30 minutes behind Buenos Aires. When it is 12:00 PM in Tehran it is 5:30 AM in Buenos Aires.

Do Tehran and Buenos Aires use different time zones?

Tehran (Iran) uses IRST at UTC+03:30, while Buenos Aires (Argentina) uses ART at UTC-03:00. The IANA identifiers are Asia/Tehran and America/Buenos_Aires.

Does daylight saving time affect the Tehran–Buenos Aires difference?

Neither zone observes daylight saving time, so the -6h 30m offset between Tehran and Buenos Aires 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 Buenos Aires?

Not normally. The -6h 30m gap only pushes the date over the previous day.

What is the time difference between Tehran and Buenos Aires?

Buenos Aires is -6h 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 Buenos Aires in?

Buenos Aires operates on Argentina Time (ART), UTC-3. As South America's most European city, Buenos Aires coordinates with Brazilian markets in the same timezone.

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 Buenos Aires?

Standard business hours in Buenos Aires are 9:00 AM - 6:00 PM ART.

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

The best overlap for a call is when both cities are in business hours. Tehran works 8:00 AM - 4:00 PM IRST and Buenos Aires works 9:00 AM - 6:00 PM ART (-6h 30m difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Tehran and Buenos Aires?

Tehran uses IRR (﷼) while Buenos Aires uses ARS ($). Check current exchange rates when planning travel or business between these cities.

How do Tehran and Buenos Aires compare in size?

Tehran has a population of approximately 9.4 million (metro: 16.8 million), while Buenos Aires has approximately 3 million (metro: 15.4 million).

What are the major landmarks in Tehran and Buenos Aires?

Tehran is known for Azadi Tower, Golestan Palace, Grand Bazaar. Buenos Aires is famous for Casa Rosada, Teatro Colón, La Boca.

Do Tehran and Buenos Aires have stock exchanges?

Yes. Tehran has the TSE (Tehran Stock Exchange) and Buenos Aires has the BCBA (Buenos Aires Stock Exchange). The -6h 30m time difference affects trading hour overlaps between these exchanges.