JST to SGT Converter
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
9:00 pm21:00 JST (UTC+9), Oct 18, 2026 = 8:00 pm20:00 SGT (UTC+8), Oct 18, 2026
JST is 1 hour ahead of SGT.
JST and SGT examples
These examples always use JST (UTC+9) and SGT (UTC+8). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
JST is 1 hour ahead of SGT.
How the time difference changes
JST is 1 hour ahead of SGT year-round.
Working hours of 9:00 am to 6:00 pm in JST correspond to 8:00 am to 5:00 pm in SGT.Working hours of 09:00 to 18:00 in JST correspond to 08:00 to 17:00 in SGT.
Compare JST time with SGT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Japan Standard Time is 1 hour ahead of Singapore Time.
9:00 pm21:00 in JST is 8:00 pm20:00 in SGT
JST to SGT call time
Best time for a conference call or a meeting is between 10am-6pm10:00-18:00 in JST which corresponds to 9am-5pm09:00-17:00 in SGT
9:00 pm21:00 Japan Standard Time (JST). Offset UTC +9:00 hours
8:00 pm20:00 Singapore Time (SGT). Offset UTC +8:00 hours
9:00 pm21:00 JST / 8:00 pm20:00 SGT
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| JST | SGT |
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| 11:00pm previous day | |
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| 23:00 previous day | |
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Japan Standard Time
Offset: JST is 9 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Japan
Principal Cities: The largest city in the JST time zone is Tokyo in Japan, with about 9.733 million people. Other major cities in this time zone include Yokohama, Osaka, Nagoya, Sapporo.
Daylight Saving: Clocks in Japan Standard Time (JST) do not change for daylight saving time, so JST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
Current time in Japan: Japan time now
JST representations, usage and related time zones
- +09 - basic short
- +0900 - basic
- +09:00 - extended
- +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
- India - Military abbreviation for JST
- I - short form of 'India'
- Asia/Tokyo
- Japan
- AWDT - Australian Western Daylight Time
- CHOST - Choibalsan Summer Time
- I - India Time Zone
- IRKST - Irkutsk Summer Time
- JST - Japan Standard Time
- KST - Korea Standard Time
- PWT - Palau Time
- TLT - East Timor Time
- ULAST - Ulaanbaatar Summer Time
- WIT - Eastern Indonesian Time
- YAKT - Yakutsk Time
Singapore Time
Offset: SGT is 8 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Singapore
Principal Cities: The largest city in the SGT time zone is Singapore in Singapore, with about 5.639 million people.
Daylight Saving: Clocks in Singapore Time (SGT) do not change for daylight saving time, so SGT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
Current time in Singapore: Singapore time now
SGT representations, usage and related time zones
- +08 - basic short
- +0800 - basic
- +08:00 - extended
- +0800 - sign character (+) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the east of the zero meridian.
- Hotel - Military abbreviation for SGT
- H - short form of 'Hotel'
- ACT - ASEAN Common Time
- AWST - Australian Western Standard Time
- BNT - Brunei Darussalam Time
- CAST - Casey Time
- CHOT - Choibalsan Time
- CST - China Standard Time
- H - Hotel Time Zone
- HKT - Hong Kong Time
- HOVST - Hovd Summer Time
- IRKT - Irkutsk Time
- KRAST - Krasnoyarsk Summer Time
- MYT - Malaysia Time
- PHT - Philippine Time
- SGT - Singapore Time
- ULAT - Ulaanbaatar Time
- WITA - Central Indonesian Time