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).

HKT to ART

-11h

HKT

HKTSOURCE

UTC+08:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

ART

UTC-03:00

HH01

MM00

01:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

HKT

ART

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

Time Conversion Guide: HKT to ART

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

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

HKT to ART time conversion table

HKT (HKT)	ART (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 HKT to ART time

Scheduling a call from HKT to ART: a 10:00 AM start in HKT lands at 11:00 PM in ART the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -11h gap: HKT and ART 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 ART is 10:00 PM in HKT.
Coordinating a HKT-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 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 HKT takes the early slot, the next week ART 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 HKT and ART

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

Business hours overlap

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

HKT is 11 hours behind ART (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 HKT and ART?

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

How do I convert HKT time to ART time?

Add -11h to HKT local time. For example, 9:00 AM in HKT is 10:00 PM in ART (previous day).

What time is it in ART right now?

ART 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 HKT.

What is the best time to call ART from HKT?

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

Which is behind, HKT or ART?

HKT is 11 hours behind ART. When it is 12:00 PM in HKT it is 1:00 AM in ART.

Does daylight saving time affect the HKT–ART difference?

Neither zone observes daylight saving time, so the -11h offset between HKT and ART is fixed all year.

Which other cities share HKT's time zone?

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

Which countries use HKT, HKT's zone?

HKT is used in Hong Kong SAR.

Is there a day difference between HKT and ART?

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

What is the time difference between HKT and ART?

ART is -11h from HKT.

What timezone is HKT in?

HKT operates on its local timezone.

What timezone is ART in?

ART operates on its local timezone.

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.