What is the time difference between HKT and JST?

Japan Standard Time (JST) is 1 hour ahead of Hong Kong Time (HKT). HKT uses a UTC offset of UTC+8, while JST uses UTC+9. For example, when it's 9:00 AM in HKT, it's 10:00 AM in JST. This difference remains constant year-round since neither timezone observes daylight saving time. Use the conversion table above to see the exact time for each hour of the day.

How do I convert HKT to JST?

To convert HKT to JST, add 1 hour to the HKT time. For example, 9:00 AM HKT is 10:00 AM JST, and 5:00 PM HKT is 6:00 PM JST. Since neither timezone observes DST, this conversion stays the same all year. You can also use the interactive converter above for quick, accurate results.

What time is it in JST when it's noon in HKT?

When it's 12:00 PM (noon) in HKT, it's 1:00 PM in JST. This is because JST is 1 hour ahead of HKT. Similarly, when it's 6:00 PM in HKT, it's 7:00 PM in JST. This relationship is constant throughout the year. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours ahead is JST from HKT?

JST is 1 hour ahead of HKT. This means when it's 9:00 AM in HKT, it's 10:00 AM in JST, and when it's midnight in HKT, it's 1:00 AM in JST. This offset is constant throughout the year since neither timezone uses daylight saving time. The conversion table above provides a complete hour-by-hour mapping.

Is JST ahead or behind HKT?

JST is ahead of HKT by 1 hour. Clocks in JST show a later time than HKT, meaning the day starts earlier in JST relative to HKT. For example, when it's morning in HKT, it's later in the morning in JST. This difference stays the same year-round.

Does HKT observe daylight saving time?

No, Hong Kong Time does not observe daylight saving time. The UTC offset of UTC+8 remains the same year-round, making time conversions from HKT more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

Does JST observe daylight saving time?

No, Japan Standard Time does not observe daylight saving time. The UTC offset of UTC+9 remains the same year-round, making time conversions to JST more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

What is the best time to call from HKT to JST?

The best time for a call between HKT and JST is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in JST during their work day, call between 8:00 AM and 4:00 PM your HKT time. Avoid calling too early or late, as the 1 hour difference means your evening could be their late night. Check the color-coded conversion table above — green hours indicate business hours in both zones, making it easy to find the ideal time.

Do HKT and JST ever have the same time?

No, HKT and JST are always 1 hour apart and never display the same clock time simultaneously. Neither timezone observes DST, so the difference is constant year-round with no seasonal variation. The 1 hour offset is determined by their fixed positions relative to the Prime Meridian (UTC). You can always rely on this consistent difference when planning across these timezones.

HKT to JST Converter

Convert Hong Kong Time to Japan Standard Time. See the hour-by-hour conversion table below.

Timezone Details

Hong Kong Time

7:07 AM

Saturday, April 4, 2026

HKT (UTC+08:00)

Japan Standard Time

8:07 AM

Saturday, April 4, 2026

JST (UTC+09:00)

Difference: +1 hour

HKT DST: No

JST DST: No

24-Hour Overview

HKT — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

JST — 24-hour overview

1a1a

4a4a

7a7a

10a10a

11a

12p

1p1p

4p4p

7p7p

10p10p

11p

12a

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

JST to HKT EST to JST JST to EST PST to JST JST to PST GMT to JST JST to GMT IST to JST JST to IST

Cities in These Timezones

HKT Cities

Hong Kong

JST Cities

Tokyo Osaka Fukuoka

More Tools

Compare HKT & JST Plan a Meeting (HKT & JST)See on Map

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

Hong Kong Time on Wikipedia Japan Standard Time on Wikipedia IANA Time Zone Database