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).

Hong Kong to Buenos Aires

-11h

Hong Kong

HKTSOURCE

Hong Kong · UTC+08:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Buenos Aires

ART

Argentina · UTC-03:00

HH01

MM00

01:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Hong Kong

Buenos Aires

12:00 AM

1:00 PM-1

2:00 AM

3:00 PM-1

4:00 AM

5:00 PM-1

6:00 AM

7:00 PM-1

8:00 AM

9:00 PM-1

10:00 AM

11:00 PM-1

12:00 PM

1:00 AM

2:00 PM

3:00 AM

4:00 PM

5:00 AM

6:00 PM

7:00 AM

8:00 PM

9:00 AM

10:00 PM

11:00 AM

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

HKT and ART on the World Map

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

HKT Zone

→

ART Zone

Explore all world timezones interactively →

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

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 Hong Kong

Wikipedia

Hong Kong Time (HKT) is UTC+8 with no daylight saving. As a major financial gateway to China, Hong Kong trading hours overlap with European morning sessions.

Population:7.5 million

Metro:7.5 million

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

Currency:HKD (HK$)

Stock Exchange:HKEX (Hong Kong Stock Exchange)

Key Landmarks

Victoria PeakTian Tan BuddhaVictoria HarbourStar FerryHong Kong Disneyland

Did You Know?

The city has one of the world's most efficient and affordable public transit systems.

Learn more about HKT 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 →

Comparing Time Zones: Hong Kong and Buenos Aires

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

In practice, when it is 9:00 AM in Hong Kong it is 10:00 PM in Buenos Aires on the previous day. Midnight in Hong Kong is 1:00 PM in Buenos Aires. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Hong Kong to Buenos Aires time conversion table

Hong Kong (HKT)	Buenos Aires (ART)	Day
12:00 AM	1:00 PM	previous day
6:00 AM	7:00 PM	previous day
7:00 AM	8:00 PM	previous day
8:00 AM	9:00 PM	previous day
9:00 AM	10:00 PM	previous day
12:00 PM	1:00 AM	same day
3:00 PM	4:00 AM	same day
5:00 PM	6:00 AM	same day
6:00 PM	7:00 AM	same day
9:00 PM	10:00 AM	same day

Why people convert Hong Kong to Buenos Aires time

Scheduling a call from Hong Kong to Buenos Aires: a 10:00 AM start in Hong Kong lands at 11:00 PM in Buenos Aires the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -11h gap: Hong Kong and Buenos Aires 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 Buenos Aires is 10:00 PM in Hong Kong.
Keeping family and friends in sync: knowing that 8:00 PM in Hong Kong is 9:00 AM in Buenos Aires makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM HKT" 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 Hong Kong takes the early slot, the next week Buenos Aires does.

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.

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 Hong Kong and Buenos Aires

With a -11h offset there is no overlap inside a normal 9 AM – 5 PM day. Buenos Aires opens at 9:00 AM ART, which is 10:00 PM in Hong Kong, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Hong Kong and Buenos Aires have no shared working hours because of the -11h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Hong Kong is 11 hours behind Buenos Aires (HKT UTC+08:00 → ART UTC-03:00). 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 Hong Kong and Buenos Aires?

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

How do I convert Hong Kong time to Buenos Aires time?

Add -11h to Hong Kong local time. For example, 9:00 AM in Hong Kong is 10:00 PM in Buenos Aires (previous day).

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 -11h offset from Hong Kong.

What is the best time to call Buenos Aires from Hong Kong?

There is no shared working-hours window because of the -11h gap. The closest option is 1:00 PM in Hong Kong, which is 2:00 AM in Buenos Aires.

Which is behind, Hong Kong or Buenos Aires?

Hong Kong is 11 hours behind Buenos Aires. When it is 12:00 PM in Hong Kong it is 1:00 AM in Buenos Aires.

Do Hong Kong and Buenos Aires use different time zones?

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

Does daylight saving time affect the Hong Kong–Buenos Aires difference?

Neither zone observes daylight saving time, so the -11h offset between Hong Kong and Buenos Aires is fixed all year.

Which other cities share Hong Kong's time zone?

HKT also covers Hong Kong, Kowloon, Tsuen Wan, Sha Tin.

Which countries use HKT, Hong Kong's zone?

HKT is used in Hong Kong SAR.

Is there a day difference between Hong Kong and Buenos Aires?

Not normally. The -11h gap only pushes the date over the previous day.

What is the time difference between Hong Kong and Buenos Aires?

Buenos Aires is -11h from Hong Kong.

What timezone is Hong Kong in?

Hong Kong Time (HKT) is UTC+8 with no daylight saving. As a major financial gateway to China, Hong Kong trading hours overlap with European morning sessions.

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 Hong Kong?

Standard business hours in Hong Kong are 9:00 AM - 6:00 PM HKT.

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 Hong Kong and Buenos Aires?

The best overlap for a call is when both cities are in business hours. Hong Kong works 9:00 AM - 6:00 PM HKT and Buenos Aires works 9:00 AM - 6:00 PM ART (-11h difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Hong Kong and Buenos Aires?

Hong Kong uses HKD (HK$) while Buenos Aires uses ARS ($). Check current exchange rates when planning travel or business between these cities.

How do Hong Kong and Buenos Aires compare in size?

Hong Kong has a population of approximately 7.5 million (metro: 7.5 million), while Buenos Aires has approximately 3 million (metro: 15.4 million).

What are the major landmarks in Hong Kong and Buenos Aires?

Hong Kong is known for Victoria Peak, Tian Tan Buddha, Victoria Harbour. Buenos Aires is famous for Casa Rosada, Teatro Colón, La Boca.

Do Hong Kong and Buenos Aires have stock exchanges?

Yes. Hong Kong has the HKEX (Hong Kong Stock Exchange) and Buenos Aires has the BCBA (Buenos Aires Stock Exchange). The -11h time difference affects trading hour overlaps between these exchanges.

Which countries use HKT (Hong Kong Time)?

HKT is used in Hong Kong SAR.

Does HKT observe daylight saving time?

No, HKT does not observe daylight saving time and remains at UTC+08:00 year-round.

What are some interesting 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.