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).

BRT to ART

+0h

BRT

BRTSOURCE

UTC-03:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

ART

UTC-03:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

BRT

ART

12:00 AM

2:00 AM

4:00 AM

6:00 AM

8:00 AM

10:00 AM

12:00 PM

2:00 PM

4:00 PM

6:00 PM

8:00 PM

10:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

BRT and ART on the World Map

The map below highlights the BRT (Brasilia Time) and ART (Argentina Time) timezone regions across the globe.

BRT Zone

→

ART Zone

Explore all world timezones interactively →

BRT – Brasilia Time

UTC-03:00

Brasilia Time (BRT) is the time zone for eastern Brazil, 3 hours behind UTC.

Countries in BRT

Brazil (eastern)

Major Cities in BRT

São PauloRio de JaneiroBrasíliaBelo HorizonteSalvadorFortalezaRecifeCuritiba

Key Facts about BRT

•Brazil abolished daylight saving time in 2019.
•São Paulo is the largest city in the Southern Hemisphere.
•BRT is 2 hours ahead of EST.
•Brazil spans four different time zones.
•The B3 stock exchange in São Paulo operates on BRT.

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

Learn more about BRT 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

Everything You Need to Know About BRT and ART Time

BRT runs on Brasilia Time (BRT) at UTC-03:00. ART runs on Argentina Time (ART) at UTC-03:00. That puts BRT no time difference ART — a difference of +0h at the current offsets.

In practice, when it is 9:00 AM in BRT it is 9:00 AM in ART. Midnight in BRT is 12:00 AM in ART. Neither zone observes daylight saving time, so the offset between them stays constant all year.

BRT to ART time conversion table

BRT (BRT)	ART (ART)	Day
12:00 AM	12:00 AM	same day
6:00 AM	6:00 AM	same day
7:00 AM	7:00 AM	same day
8:00 AM	8:00 AM	same day
9:00 AM	9:00 AM	same day
12:00 PM	12:00 PM	same day
3:00 PM	3:00 PM	same day
5:00 PM	5:00 PM	same day
6:00 PM	6:00 PM	same day
9:00 PM	9:00 PM	same day

Why people convert BRT to ART time

Scheduling a call from BRT to ART: a 10:00 AM start in BRT lands at 10:00 AM in ART, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both BRT and ART are inside the 9-to-5 working day between 9:00 AM and 5:00 PM BRT time (9:00 AM–5:00 PM ART). That is roughly 8 hours of usable overlap.
Coordinating a BRT-based team with ART 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 BRT" is unambiguous; "3 PM" across a +0h gap is not.
Block 9:00 AM–5:00 PM BRT as the recurring meeting window if you work primarily from BRT and need ART colleagues present.

About BRT (Brasilia Time)

Brasilia Time (BRT) is the standard time in the most populous regions of Brazil, including São Paulo, Rio de Janeiro, and the capital Brasília. Brazil abolished daylight saving time in 2019, so BRT is now observed year-round in these regions. Brazil spans four time zones in total.

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 BRT and ART

Both BRT and ART sit inside the 9 AM – 5 PM working day between 9:00 AM–5:00 PM BRT, which is 9:00 AM–5:00 PM ART. That gives roughly 8 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

BRT and ART share 8 hours of working-hours overlap (9:00 AM–5:00 PM BRT), so scheduling a live meeting is straightforward.

BRT is no time difference ART (BRT UTC-03:00 → ART UTC-03:00). The shared working window is 9:00 AM–5:00 PM BRT. Remember to re-check around daylight-saving transitions.