HKT to JST Time Converter
Use this HKT to JST time converter to compare Hong Kong and Japan time instantly. JST is 1 hour ahead of HKT, so 9:00 AM HKT becomes 10:00 AM JST and 5:00 PM HKT becomes 6:00 PM JST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
HKT to JST Quick Facts
Use this HKT to JST converter to compare Hong Kong and Japan time, check the 1 hour gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 9:00 AM HKT / 10:00 AM JST.
How to Convert HKT to JST
Converting between Hong Kong Time and Japan Standard Time means accounting for a 1 hour gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Hong Kong Time (UTC +8) that you want to convert. Hit "Now" to load the current HKT time instantly, or use "+1h" to step forward and compare.
The equivalent Japan Standard Time (UTC +9) time appears immediately. Since JST is 1 hour ahead of HKT, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the JST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
Why Choose Our HKT to JST Converter
When someone in Hong Kong suggests 9:00 AM HKT, that's 10:00 AM JST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night HKT times can land on a different date in JST because of the 1 hour offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the HKT–JST gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in HKT. Convert the event time to JST so you know exactly when to tune in — with a 1 hour difference, a morning event in Hong Kong falls during work hours in Japan.
HKT to JST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Hong Kong Time to Japan Standard Time full day schedule
| Hong Kong Time | Japan Standard Time |
|---|---|
| 12:00 AM |
1:00 AM
|
| 1:00 AM |
2:00 AM
|
| 2:00 AM |
3:00 AM
|
| 3:00 AM |
4:00 AM
|
| 4:00 AM |
5:00 AM
|
| 5:00 AM |
6:00 AM
|
| 6:00 AM |
7:00 AM
|
| 7:00 AM |
8:00 AM
|
| 8:00 AM |
9:00 AM
|
| 9:00 AM |
10:00 AM
|
| 10:00 AM |
11:00 AM
|
| 11:00 AM |
12:00 PM
|
| 12:00 PM |
1:00 PM
|
| 1:00 PM |
2:00 PM
|
| 2:00 PM |
3:00 PM
|
| 3:00 PM |
4:00 PM
|
| 4:00 PM |
5:00 PM
|
| 5:00 PM |
6:00 PM
|
| 6:00 PM |
7:00 PM
|
| 7:00 PM |
8:00 PM
|
| 8:00 PM |
9:00 PM
|
| 9:00 PM |
10:00 PM
|
| 10:00 PM |
11:00 PM
|
| 11:00 PM |
12:00 AM
(next day)
|
Timezone offsets and DST rules verified against the IANA Time Zone Database. Conversion math and business-hour overlap windows double-checked against real-world scheduling scenarios.
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HKT to JST FAQ
Quick answers about daylight saving time, date changes, business-hour overlap, and the most common scheduling questions between Hong Kong Time and Japan Standard Time.
What is the time difference between HKT and JST?
When can HKT and JST have business-hour overlap?
Does HKT or JST observe daylight saving time?
How do I quickly convert HKT to JST?
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