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).

Buenos Aires to CLT

-1h

Buenos Aires

ARTSOURCE

Argentina · UTC-03:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

CLT

UTC-03:00☀ DST active

HH11

MM00

11:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Buenos Aires

CLT

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)

ART and CLT on the World Map

The map below highlights the ART (Argentina Time) and CLT (Chile Standard Time) timezone regions across the globe.

ART Zone

→

CLT Zone

Explore all world timezones interactively →

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

CLT – Chile Standard Time

UTC-04:00

Chile Standard Time (CLT) is the time zone for continental Chile, 4 hours behind UTC.

Countries in CLT

Chile

Major Cities in CLT

SantiagoValparaísoConcepciónViña del MarAntofagasta

Key Facts about CLT

•Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer.
•Santiago is the largest city in Chile with over 6 million in the metro area.
•Chile spans over 4,300 km from north to south but uses one timezone.

Daylight Saving:Yes – switches to CLST

Learn more about CLT on Wikipedia

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 →

Buenos Aires vs CLT: Offsets, DST and Best Call Times

Buenos Aires runs on Argentina Standard Time (ART) at UTC-03:00. CLT runs on Chile Standard Time (CLT) at UTC-04:00. That puts Buenos Aires 1 hour behind CLT — a difference of -1h at the current offsets.

In practice, when it is 9:00 AM in Buenos Aires it is 8:00 AM in CLT. Midnight in Buenos Aires is 11:00 PM in CLT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Buenos Aires to CLT time conversion table

Buenos Aires (ART)	CLT (CLT)	Day
12:00 AM	11:00 PM	previous day
6:00 AM	5:00 AM	same day
7:00 AM	6:00 AM	same day
8:00 AM	7:00 AM	same day
9:00 AM	8:00 AM	same day
12:00 PM	11:00 AM	same day
3:00 PM	2:00 PM	same day
5:00 PM	4:00 PM	same day
6:00 PM	5:00 PM	same day
9:00 PM	8:00 PM	same day

Why people convert Buenos Aires to CLT time

Scheduling a call from Buenos Aires to CLT: a 10:00 AM start in Buenos Aires lands at 9:00 AM in CLT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Buenos Aires and CLT are inside the 9-to-5 working day between 10:00 AM and 5:00 PM ART time (9:00 AM–4:00 PM CLT). That is roughly 7 hours of usable overlap.
Watching a live event or market open: Buenos Aires viewers need 8:00 AM in CLT to catch a 9:00 AM start there, and 1:00 AM if the event is anchored to Buenos Aires.

Always state the zone abbreviation, not just the hour. "3:00 PM ART" is unambiguous; "3 PM" across a -1h gap is not.
Block 10:00 AM–5:00 PM ART as the recurring meeting window if you work primarily from Buenos Aires and need CLT colleagues present.

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.

About CLT (Chile Standard Time)

Chile Standard Time (CLT) is the standard time in Chile. During summer months (October to March), Chile switches to Chile Summer Time (CLST, UTC-03:00). Chile is the longest north-south country in the world.

Best time to call between Buenos Aires and CLT

Both Buenos Aires and CLT sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM ART, which is 9:00 AM–4:00 PM CLT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Buenos Aires and CLT share 7 hours of working-hours overlap (10:00 AM–5:00 PM ART), so scheduling a live meeting is straightforward.

Buenos Aires is 1 hour behind CLT (ART UTC-03:00 → CLT UTC-04:00). The shared working window is 10:00 AM–5:00 PM ART. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Buenos Aires

Does not observe DST

CLT

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Apr 4, 2027

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 Buenos Aires and CLT?

Buenos Aires (ART, UTC-03:00) is 1 hour behind CLT (CLT, UTC-04:00). The gap is currently -1h.

How do I convert Buenos Aires time to CLT time?

Add -1h to Buenos Aires local time. For example, 9:00 AM in Buenos Aires is 8:00 AM in CLT.

What time is it in CLT right now?

CLT uses CLT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from Buenos Aires.

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

Call between 10:00 AM and 5:00 PM ART — that maps to 9:00 AM–4:00 PM CLT and keeps both parties inside the working day.

Which is behind, Buenos Aires or CLT?

Buenos Aires is 1 hour behind CLT. When it is 12:00 PM in Buenos Aires it is 11:00 AM in CLT.

Do Buenos Aires and CLT use different time zones?

Buenos Aires (Argentina) uses ART at UTC-03:00, while CLT uses CLT at UTC-04:00. The IANA identifiers are America/Buenos_Aires and America/Santiago.

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

Neither zone observes daylight saving time, so the -1h offset between Buenos Aires and CLT is fixed all year.

Which other cities share Buenos Aires's time zone?

ART also covers Buenos Aires, Córdoba, Rosario, Mendoza, La Plata, Tucumán.

Which countries use ART, Buenos Aires's zone?

ART is used in Argentina.

Is there a day difference between Buenos Aires and CLT?

Not normally. The -1h gap only pushes the date over the previous day.

What is the time difference between Buenos Aires and CLT?

CLT is -1h from Buenos Aires.

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 timezone is CLT in?

CLT operates on its local timezone.

What are the business hours in Buenos Aires?

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

Which countries use ART (Argentina Time)?

ART is used in Argentina.

Does ART observe daylight saving time?

No, ART does not observe daylight saving time and remains at UTC-03:00 year-round.

What are some interesting facts about ART?

Argentina does not observe daylight saving time. Buenos Aires is one of the most visited cities in South America.

Which cities are in the CLT timezone?

Major cities in the CLT timezone include Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.

What is the UTC offset for CLT?

Chile Standard Time (CLT) is at UTC-04:00. During daylight saving time, it shifts to CLST.

What should I know about the CLT timezone?

Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer. Santiago is the largest city in Chile with over 6 million in the metro area.