Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between jst and sgt?
Japan Standard Time (jst) is UTC+9 and Singapore Time (sgt) is UTC+8. The difference between them is 1 hours.
Where is jst used?
Japan Standard Time (jst) is used in Japan and surrounding regions. The IANA timezone identifier is Asia/Tokyo.
Where is sgt used?
Singapore Time (sgt) is used in Singapore and surrounding regions. The IANA timezone identifier is Asia/Singapore.
How do I convert jst to sgt?
Use the interactive converter above. Drag the time slider to any jst time and the sgt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
How far apart are JST (Tokyo) and SGT (Singapore)?
JST (Tokyo) is 1 hour ahead of SGT (Singapore). When it's noon in JST (Tokyo), it's 11:00 in SGT (Singapore).
JST (Tokyo) runs on Asia/Tokyo; SGT (Singapore) runs on Asia/Singapore. Together they are 1 hour apart.
Daily overlap window
Both JST (Tokyo) and SGT (Singapore) are simultaneously in business hours for 7 hours per day (assuming standard 9:00–17:00 working hours).
00:0006:0012:0018:0024:00
JST (Tokyo)
SGT (Singapore)
Overlap (7h)
Best call times between these locations
There is a 7-hour daily window where both locations are in business hours. The 3 best slots are listed below.
10:00 Tokyo / 09:00 Singapore✓ Both working
11:00 Tokyo / 10:00 Singapore✓ Both working
12:00 Tokyo / 11:00 Singapore✓ Both working
Working hours defined as 09:00–17:00 local time for each location.
Public holidays this year
⚡ Upcoming holidays in both locations, confirm with your contact before booking.
JST (Tokyo)7 holidays
Jul 20Marine Day
Aug 11Mountain Day
Sep 21Respect for the Aged Day
Sep 23Autumnal Equinox Day
Oct 12Sports Day
SGT (Singapore)3 holidays
Aug 10National Day
Nov 9Deepavali
Dec 25Christmas Day
JST (Tokyo) and SGT (Singapore) — practical scheduling
JST (Tokyo) (Japan) and SGT (Singapore) (Singapore) are 1 hours apart. With a 7-hour daily overlap in standard business hours, both teams can connect in real time without either side stretching beyond their normal workday.
💡 Practical scheduling guidelines
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If you are in JST (Tokyo), aim for 10:00–11:00, which corresponds to 09:00–10:00 in SGT (Singapore) — both teams are within working hours.
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If you are in JST (Tokyo), aim for 11:00–12:00, which corresponds to 10:00–11:00 in SGT (Singapore) — both teams are within working hours.
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If you are in JST (Tokyo), aim for 12:00–13:00, which corresponds to 11:00–12:00 in SGT (Singapore) — both teams are within working hours.
Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.
Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am JST (Tokyo)".
