JST to SGT Time Converter
Use this JST to SGT time converter to compare Japan and Singapore time instantly. SGT is 1 hour behind JST, so 9:00 AM JST becomes 8:00 AM SGT and 5:00 PM JST becomes 4:00 PM SGT. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
JST to SGT Quick Facts
Use this JST to SGT converter to compare Japan and Singapore time, check the 1 hour gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 10:00 AM JST / 9:00 AM SGT.
How to Convert JST to SGT
Converting between Japan Standard Time and Singapore 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 Japan Standard Time (UTC +9) that you want to convert. Hit "Now" to load the current JST time instantly, or use "+1h" to step forward and compare.
The equivalent Singapore Time (UTC +8) time appears immediately. Since SGT is 1 hour behind of JST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the SGT 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 JST to SGT Converter
When someone in Japan suggests 10:00 AM JST, that's 9:00 AM SGT. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night JST times can land on a different date in SGT 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 JST–SGT 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 JST. Convert the event time to SGT so you know exactly when to tune in — with a 1 hour difference, a morning event in Japan falls during work hours in Singapore.
JST to SGT Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Japan Standard Time to Singapore Time full day schedule
| Japan Standard Time | Singapore Time |
|---|---|
| 12:00 AM |
11:00 PM
(previous day)
|
| 1:00 AM |
12:00 AM
|
| 2:00 AM |
1:00 AM
|
| 3:00 AM |
2:00 AM
|
| 4:00 AM |
3:00 AM
|
| 5:00 AM |
4:00 AM
|
| 6:00 AM |
5:00 AM
|
| 7:00 AM |
6:00 AM
|
| 8:00 AM |
7:00 AM
|
| 9:00 AM |
8:00 AM
|
| 10:00 AM |
9:00 AM
|
| 11:00 AM |
10:00 AM
|
| 12:00 PM |
11:00 AM
|
| 1:00 PM |
12:00 PM
|
| 2:00 PM |
1:00 PM
|
| 3:00 PM |
2:00 PM
|
| 4:00 PM |
3:00 PM
|
| 5:00 PM |
4:00 PM
|
| 6:00 PM |
5:00 PM
|
| 7:00 PM |
6:00 PM
|
| 8:00 PM |
7:00 PM
|
| 9:00 PM |
8:00 PM
|
| 10:00 PM |
9:00 PM
|
| 11:00 PM |
10:00 PM
|
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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JST to SGT FAQ
Quick answers about daylight saving time, date changes, business-hour overlap, and the most common scheduling questions between Japan Standard Time and Singapore Time.
What is the time difference between JST and SGT?
When can JST and SGT have business-hour overlap?
Does JST or SGT observe daylight saving time?
How do I quickly convert JST to SGT?
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