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 Japan

+1h

Hong Kong

HKTSOURCE

Hong Kong · UTC+08:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Japan

JST

UTC+09:00

HH01

MM00

13:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Hong Kong

Japan

12:00 AM

1:00 AM

2:00 AM

3:00 AM

4:00 AM

5:00 AM

6:00 AM

7:00 AM

8:00 AM

9:00 AM

10:00 AM

11:00 AM

12:00 PM

1:00 PM

2:00 PM

3:00 PM

4:00 PM

5:00 PM

6:00 PM

7:00 PM

8:00 PM

9:00 PM

10:00 PM

11:00 PM

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

HKT and JST on the World Map

The map below highlights the HKT (Hong Kong Time) and JST (Japan Standard Time) timezone regions across the globe.

HKT Zone

→

JST 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

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 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 →

Hong Kong vs Japan: Offsets, DST and Best Call Times

Hong Kong runs on Hong Kong Standard Time (HKT) at UTC+08:00. Japan runs on Japan Standard Time (JST) at UTC+09:00. That puts Hong Kong 1 hour ahead of Japan — a difference of +1h at the current offsets.

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

Hong Kong to Japan time conversion table

Hong Kong (HKT)	Japan (JST)	Day
12:00 AM	1:00 AM	same day
6:00 AM	7:00 AM	same day
7:00 AM	8:00 AM	same day
8:00 AM	9:00 AM	same day
9:00 AM	10:00 AM	same day
12:00 PM	1:00 PM	same day
3:00 PM	4:00 PM	same day
5:00 PM	6:00 PM	same day
6:00 PM	7:00 PM	same day
9:00 PM	10:00 PM	same day

Why people convert Hong Kong to Japan time

Scheduling a call from Hong Kong to Japan: a 10:00 AM start in Hong Kong lands at 11:00 AM in Japan, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Hong Kong and Japan are inside the 9-to-5 working day between 9:00 AM and 4:00 PM HKT time (10:00 AM–5:00 PM JST). That is roughly 7 hours of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in Hong Kong is 9:00 PM in Japan 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 +1h gap is not.
Block 9:00 AM–4:00 PM HKT as the recurring meeting window if you work primarily from Hong Kong and need Japan colleagues present.

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 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 Hong Kong and Japan

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

Business hours overlap

Hong Kong and Japan share 7 hours of working-hours overlap (9:00 AM–4:00 PM HKT), so scheduling a live meeting is straightforward.

Hong Kong is 1 hour ahead of Japan (HKT UTC+08:00 → JST UTC+09:00). The shared working window is 9:00 AM–4:00 PM HKT. 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 Japan?

Hong Kong (HKT, UTC+08:00) is 1 hour ahead of Japan (JST, UTC+09:00). The gap is currently +1h.

How do I convert Hong Kong time to Japan time?

Add +1h to Hong Kong local time. For example, 9:00 AM in Hong Kong is 10:00 AM 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 +1h offset from Hong Kong.

What is the best time to call Japan from Hong Kong?

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

Which is ahead, Hong Kong or Japan?

Hong Kong is 1 hour ahead of Japan. When it is 12:00 PM in Hong Kong it is 1:00 PM in Japan.

Do Hong Kong and Japan use different time zones?

Hong Kong (Hong Kong) uses HKT at UTC+08:00, while Japan (Japan) uses JST at UTC+09:00. The IANA identifiers are Asia/Hong_Kong and Asia/Tokyo.

Does daylight saving time affect the Hong Kong–Japan difference?

Neither zone observes daylight saving time, so the +1h offset between Hong Kong and Japan 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 Japan?

Not normally. The +1h gap only pushes the date over for late-evening times.

What is the time difference between Hong Kong and Japan?

Japan is +1h 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 Japan in?

Japan operates on its local timezone.

What are the business hours in Hong Kong?

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

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.