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 HKT

+11h

Buenos Aires

ARTSOURCE

Argentina · UTC-03:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

HKT

UTC+08:00

HH11

MM00

23:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Buenos Aires

HKT

12:00 AM

11:00 AM

2:00 AM

1:00 PM

4:00 AM

3:00 PM

6:00 AM

5:00 PM

8:00 AM

7:00 PM

10:00 AM

9:00 PM

12:00 PM

11:00 PM

2:00 PM

1:00 AM+1

4:00 PM

3:00 AM+1

6:00 PM

5:00 AM+1

8:00 PM

7:00 AM+1

10:00 PM

9:00 AM+1

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

ART and HKT on the World Map

The map below highlights the ART (Argentina Time) and HKT (Hong Kong Time) timezone regions across the globe.

ART Zone

→

HKT 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

HKT – Hong Kong Time

UTC+08:00

Hong Kong Time (HKT, UTC+08:00) is the time zone for Hong Kong, 8 hours ahead of UTC.

Countries in HKT

Hong Kong SAR

Major Cities in HKT

Hong KongKowloonTsuen WanSha Tin

Key Facts about HKT

•Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979.
•HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.
•The Hong Kong Stock Exchange opens at 09:30 HKT.
•Hong Kong Time does not change with the seasons, so its gap to other zones is fixed.

Daylight Saving:No – UTC+08:00 year-round

Learn more about HKT 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 →

Understanding the +11h Gap: Buenos Aires vs HKT

Buenos Aires runs on Argentina Standard Time (ART) at UTC-03:00. HKT runs on Hong Kong Time (HKT) at UTC+08:00. That puts Buenos Aires 11 hours ahead of HKT — a difference of +11h at the current offsets.

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

Buenos Aires to HKT time conversion table

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

Why people convert Buenos Aires to HKT time

Scheduling a call from Buenos Aires to HKT: a 10:00 AM start in Buenos Aires lands at 9:00 PM in HKT, so you can confirm the slot without doing the arithmetic yourself.
Handling a +11h gap: Buenos Aires and HKT 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 HKT is 8:00 PM in Buenos Aires.
Booking travel or deliveries: tracking HKT local time against Buenos Aires keeps pickup windows and arrival estimates honest across the +11h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM ART" is unambiguous; "3 PM" across a +11h gap is not.
With a +11h 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 HKT 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 HKT (Hong Kong Time)

Hong Kong Time (HKT) is fixed at UTC+08:00 all year and does not observe daylight saving time. Hong Kong last used summer time in 1979 and has kept a single offset since. HKT shares the UTC+08:00 offset with China Standard Time, Singapore Time, Malaysian Time, Philippine Time and Australian Western Standard Time, but is listed separately because Hong Kong maintains its own timekeeping authority. As a major financial centre, Hong Kong's trading hours set the rhythm for markets across Asia, opening at 09:30 HKT which is 01:30 in London and 20:30 the previous evening in New York.

Best time to call between Buenos Aires and HKT

With a +11h offset there is no overlap inside a normal 9 AM – 5 PM day. HKT opens at 9:00 AM HKT, which is 8:00 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 HKT have no shared working hours because of the +11h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Buenos Aires is 11 hours ahead of HKT (ART UTC-03:00 → HKT UTC+08:00). 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 HKT?

Buenos Aires (ART, UTC-03:00) is 11 hours ahead of HKT (HKT, UTC+08:00). The gap is currently +11h.

How do I convert Buenos Aires time to HKT time?

Add +11h to Buenos Aires local time. For example, 9:00 AM in Buenos Aires is 8:00 PM in HKT.

What time is it in HKT right now?

HKT uses HKT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +11h offset from Buenos Aires.

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

There is no shared working-hours window because of the +11h gap. The closest option is 1:00 PM in Buenos Aires, which is 12:00 AM in HKT.

Which is ahead, Buenos Aires or HKT?

Buenos Aires is 11 hours ahead of HKT. When it is 12:00 PM in Buenos Aires it is 11:00 PM in HKT.

Do Buenos Aires and HKT use different time zones?

Buenos Aires (Argentina) uses ART at UTC-03:00, while HKT uses HKT at UTC+08:00. The IANA identifiers are America/Buenos_Aires and Asia/Hong_Kong.

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

Neither zone observes daylight saving time, so the +11h offset between Buenos Aires and HKT 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 HKT?

Not normally. The +11h gap only pushes the date over for late-evening times.

What is the time difference between Buenos Aires and HKT?

HKT is +11h 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 HKT in?

HKT 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 HKT timezone?

Major cities in the HKT timezone include Hong Kong, Kowloon, Tsuen Wan, Sha Tin.

What is the UTC offset for HKT?

Hong Kong Time (HKT) is at UTC+08:00.

What should I know about the HKT timezone?

Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979. HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.