SGT ↔ JST Time Converter

Japan Standard Time (JST) is 1h ahead of Singapore Standard Time (SGT). SGT runs at UTC+8 and JST at UTC+9. Quick time examples: 8:00 AM SGT = 9:00 AM JST; 12:00 PM SGT = 1:00 PM JST; 5:00 PM SGT = 6:00 PM JST.

To convert SGT to JST, add 1 hour to the SGT time. For example, 12:00 PM SGT becomes 1:00 PM JST. When the result crosses midnight, advance the date by one day (shown as "+1 Day" in the converter). The converter on this page handles all arithmetic and date-rollover automatically.

Japan Standard Time (JST) is 1h ahead of Singapore Standard Time (SGT). Reversed: SGT is 1h behind of JST. Practical example: noon in Tokyo (12:00 PM JST) corresponds to 11:00 AM SGT in Singapore, and 5 PM in Tokyo corresponds to 4:00 PM SGT.

Singapore Standard Time (SGT) is the standard civil time for Singapore and the surrounding region, operating at UTC+8 from UTC. It does not observe Daylight Saving Time; the UTC offset stays at UTC+8 every day of the year. Major cities: Singapore, Kuala Lumpur, Penang, Johor Bahru, George Town, Ipoh, Kuching.

Japan Standard Time (JST) covers Tokyo and the surrounding region at UTC+9 from UTC. It does not observe Daylight Saving Time — the offset is fixed at UTC+9 all year with no seasonal change. Cities in this zone: Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Sapporo, Fukuoka.

No — and this makes SGT–JST one of the simpler pairs to schedule across. Neither zone observes Daylight Saving Time, so the offset is exactly 1h ahead every single day of the year. You can set up a recurring calendar invite once and never adjust it for seasonal clock changes on either side.

The best meeting window is where standard working hours (9 AM – 6 PM) overlap in both zones. Since JST is 1h ahead of SGT, mornings in the earlier zone align with afternoons or evenings in the later zone. Target 8 AM – 11 AM in the earlier-offset zone to keep both sides in reasonable hours. The meeting hours table above shows the exact recommended slots for this pair. Any time where one side falls before 7 AM or after 9 PM is best avoided for regular team calls.

Type any time directly into the JST field in the bidirectional converter above — it instantly shows the SGT result. Alternatively, subtract 1 hour from the JST time manually. For a dedicated reverse page, visit: JST to SGT converter ↗.

For some hours of the day the conversion does cross midnight into the next or previous calendar day. When the converted time passes 11:59 PM, the date advances — the converter shows "+1 Day". When it goes before 12:00 AM, the date moves back — "-1 Day" appears. The 24-hour reference table also shows day changes in the Day column. Always check the date indicator when sending calendar invites across these two zones to avoid accidentally booking on the wrong date.

Singapore Standard Time (SGT) is used in: Singapore, Kuala Lumpur, Penang, Johor Bahru, George Town, Ipoh, Kuching. The zone operates at UTC+8, with a constant offset all year.

Japan Standard Time (JST) covers: Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Sapporo, Fukuoka. It runs at UTC+9, fixed year-round with no DST change. Use the live clocks at the top of this page to see the current local time in both zones side by side.

Yes — since neither SGT nor JST observes DST, the offset is exactly 1h ahead every day of the year without exception.

When creating a recurring meeting that spans SGT and JST, set the event timezone in your calendar app using the IANA timezone names: Asia/Singapore for SGT and Asia/Tokyo for JST. Using IANA names rather than fixed UTC offsets ensures the calendar app automatically adjusts future occurrences for any DST changes, so you never accidentally schedule at the wrong time after a clock transition. For a quick lookup of any specific time, the converter on this page is the fastest way to verify both sides before you send the invite.

No. Singapore has not observed Daylight Saving Time since 1982 and has maintained a fixed UTC+8 offset ever since. This makes SGT particularly easy to work with for recurring international meetings — the SGT side of any timezone pair is always exactly UTC+8, with no seasonal variation. SGT aligns numerically with Hong Kong Time (HKT), China Standard Time (CST8), Philippine Standard Time, and Australian Western Standard Time (AWST).

No. Japan abolished Daylight Saving Time in 1951 and has not used it since. Japan Standard Time (JST) is fixed at UTC+9 every day of the year without exception. This makes JST one of the most predictable zones for international scheduling — the JST offset never changes, so a recurring SGT–JST meeting will always occur at the same relative time.