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 Osaka

+1h

Hong Kong

HKTSOURCE

Hong Kong · UTC+08:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Osaka

JST

Japan · UTC+09:00

HH01

MM00

13:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Hong Kong

Osaka

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 →

About Osaka

Wikipedia

Osaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.

Population:2.8 million

Metro:19 million

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

Currency:JPY (¥)

Stock Exchange:OSE (Osaka Exchange - derivatives)

Key Landmarks

Osaka CastleDotonboriUniversal Studios JapanShitennoji TempleUmeda Sky Building

Did You Know?

Osaka Castle was originally built in 1583 and has been rebuilt several times.

Learn more about JST timezone →

Comparing Time Zones: Hong Kong and Osaka

Hong Kong runs on Hong Kong Standard Time (HKT) at UTC+08:00. Osaka runs on Japan Standard Time (JST) at UTC+09:00. That puts Hong Kong 1 hour ahead of Osaka — 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 Osaka. Midnight in Hong Kong is 1:00 AM in Osaka. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Hong Kong to Osaka time conversion table

Hong Kong (HKT)	Osaka (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 Osaka time

Scheduling a call from Hong Kong to Osaka: a 10:00 AM start in Hong Kong lands at 11:00 AM in Osaka, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Hong Kong and Osaka 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.
Watching a live event or market open: Hong Kong viewers need 10:00 AM in Osaka to catch a 9:00 AM start there, and 11:00 PM if the event is anchored to Hong Kong.

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 Osaka 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 Osaka

Both Hong Kong and Osaka 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 Osaka 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 Osaka (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 Osaka?

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

How do I convert Hong Kong time to Osaka time?

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

What time is it in Osaka right now?

Osaka 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 Osaka 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 Osaka?

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

Do Hong Kong and Osaka use different time zones?

Hong Kong (Hong Kong) uses HKT at UTC+08:00, while Osaka (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–Osaka difference?

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

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

What is the time difference between Hong Kong and Osaka?

Osaka 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 Osaka in?

Osaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.

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 Osaka?

Standard business hours in Osaka are 9:00 AM - 6:00 PM JST.

What is the best time to schedule a call between Hong Kong and Osaka?

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 Osaka works 9:00 AM - 6:00 PM JST (+1h difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Hong Kong and Osaka?

Hong Kong uses HKD (HK$) while Osaka uses JPY (¥). Check current exchange rates when planning travel or business between these cities.

How do Hong Kong and Osaka compare in size?

Hong Kong has a population of approximately 7.5 million (metro: 7.5 million), while Osaka has approximately 2.8 million (metro: 19 million).

What are the major landmarks in Hong Kong and Osaka?

Hong Kong is known for Victoria Peak, Tian Tan Buddha, Victoria Harbour. Osaka is famous for Osaka Castle, Dotonbori, Universal Studios Japan.

Do Hong Kong and Osaka have stock exchanges?

Yes. Hong Kong has the HKEX (Hong Kong Stock Exchange) and Osaka has the OSE (Osaka Exchange - derivatives). The +1h 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.