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.

Buenos Aires to Japan

+12h

Buenos Aires

ARTSOURCE

Argentina · UTC-03:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Japan

JST

UTC+09:00

HH12

MM00

(next day)00:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Buenos Aires

Japan

12:00 AM

12:00 PM

2:00 AM

2:00 PM

4:00 AM

4:00 PM

6:00 AM

6:00 PM

8:00 AM

8:00 PM

10:00 AM

10:00 PM

12:00 PM

12:00 AM+1

2:00 PM

2:00 AM+1

4:00 PM

4:00 AM+1

6:00 PM

6:00 AM+1

8:00 PM

8:00 AM+1

10:00 PM

10:00 AM+1

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

ART and JST on the World Map

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

ART Zone

→

JST 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

JST – Japan Standard Time

UTC+09:00

Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.

Countries in JST

Japan

Major Cities in JST

TokyoOsakaYokohamaNagoyaSapporoKyotoKobeFukuokaHiroshima

Key Facts about JST

•Japan does not observe daylight saving time.
•Tokyo is the most populous metropolitan area in the world.
•The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
•JST is 14 hours ahead of EST and 9 hours ahead of GMT.

Daylight Saving:No – UTC+09:00 year-round

Learn more about JST 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 to Japan Time Difference – Complete Guide

Buenos Aires runs on Argentina Standard Time (ART) at UTC-03:00. Japan runs on Japan Standard Time (JST) at UTC+09:00. That puts Buenos Aires 12 hours ahead of Japan — a difference of +12h at the current offsets.

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

Buenos Aires to Japan time conversion table

Buenos Aires (ART)	Japan (JST)	Day
12:00 AM	12:00 PM	same day
6:00 AM	6:00 PM	same day
7:00 AM	7:00 PM	same day
8:00 AM	8:00 PM	same day
9:00 AM	9:00 PM	same day
12:00 PM	12:00 AM	next day
3:00 PM	3:00 AM	next day
5:00 PM	5:00 AM	next day
6:00 PM	6:00 AM	next day
9:00 PM	9:00 AM	next day

Why people convert Buenos Aires to Japan time

Scheduling a call from Buenos Aires to Japan: a 10:00 AM start in Buenos Aires lands at 10:00 PM in Japan, so you can confirm the slot without doing the arithmetic yourself.
Handling a +12h gap: Buenos Aires and Japan have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Japan is 9:00 PM in Buenos Aires.
Keeping family and friends in sync: knowing that 8:00 PM in Buenos Aires is 8:00 AM in Japan makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM ART" is unambiguous; "3 PM" across a +12h gap is not.
With a +12h gap there is no shared 9-to-5 window, so alternate the early start: one week Buenos Aires takes the early slot, the next week Japan does.

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 JST (Japan Standard Time)

Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.

Best time to call between Buenos Aires and Japan

With a +12h offset there is no overlap inside a normal 9 AM – 5 PM day. Japan opens at 9:00 AM JST, which is 9:00 PM in Buenos Aires, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Buenos Aires and Japan have no shared working hours because of the +12h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Buenos Aires is 12 hours ahead of Japan (ART UTC-03:00 → JST UTC+09:00). There is no shared 9-to-5 window, so plan around an early or late slot. 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 Buenos Aires and Japan?

Buenos Aires (ART, UTC-03:00) is 12 hours ahead of Japan (JST, UTC+09:00). The gap is currently +12h.

How do I convert Buenos Aires time to Japan time?

Add +12h to Buenos Aires local time. For example, 9:00 AM in Buenos Aires is 9:00 PM in Japan.

What time is it in Japan right now?

Japan uses JST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +12h offset from Buenos Aires.

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

There is no shared working-hours window because of the +12h gap. The closest option is 1:00 PM in Buenos Aires, which is 1:00 AM in Japan.

Which is ahead, Buenos Aires or Japan?

Buenos Aires is 12 hours ahead of Japan. When it is 12:00 PM in Buenos Aires it is 12:00 AM in Japan.

Do Buenos Aires and Japan use different time zones?

Buenos Aires (Argentina) uses ART at UTC-03:00, while Japan (Japan) uses JST at UTC+09:00. The IANA identifiers are America/Buenos_Aires and Asia/Tokyo.

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

Neither zone observes daylight saving time, so the +12h offset between Buenos Aires and Japan 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 Japan?

Sometimes. The +12h gap is large enough that 8:00 PM or later in Buenos Aires already falls on the next day in Japan.

What is the time difference between Buenos Aires and Japan?

Japan is +12h 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.