What is the time difference between SGT and JST?

Japan Standard Time (JST) is 1 hour ahead of Singapore Time (SGT). SGT uses a UTC offset of UTC+8, while JST uses UTC+9. For example, when it's 9:00 AM in SGT, it's 10:00 AM in JST. This difference remains constant year-round since neither timezone observes daylight saving time. Use the conversion table above to see the exact time for each hour of the day.

How do I convert SGT to JST?

To convert SGT to JST, add 1 hour to the SGT time. For example, 9:00 AM SGT is 10:00 AM JST, and 5:00 PM SGT is 6:00 PM JST. Since neither timezone observes DST, this conversion stays the same all year. You can also use the interactive converter above for quick, accurate results.

What time is it in JST when it's noon in SGT?

When it's 12:00 PM (noon) in SGT, it's 1:00 PM in JST. This is because JST is 1 hour ahead of SGT. Similarly, when it's 6:00 PM in SGT, it's 7:00 PM in JST. This relationship is constant throughout the year. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours ahead is JST from SGT?

JST is 1 hour ahead of SGT. This means when it's 9:00 AM in SGT, it's 10:00 AM in JST, and when it's midnight in SGT, it's 1:00 AM in JST. This offset is constant throughout the year since neither timezone uses daylight saving time. The conversion table above provides a complete hour-by-hour mapping.

Is JST ahead or behind SGT?

JST is ahead of SGT by 1 hour. Clocks in JST show a later time than SGT, meaning the day starts earlier in JST relative to SGT. For example, when it's morning in SGT, it's later in the morning in JST. This difference stays the same year-round.

Does SGT observe daylight saving time?

No, Singapore Time does not observe daylight saving time. The UTC offset of UTC+8 remains the same year-round, making time conversions from SGT more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

Does JST observe daylight saving time?

No, Japan Standard Time does not observe daylight saving time. The UTC offset of UTC+9 remains the same year-round, making time conversions to JST more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

What is the best time to call from SGT to JST?

The best time for a call between SGT and JST is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in JST during their work day, call between 8:00 AM and 4:00 PM your SGT time. Avoid calling too early or late, as the 1 hour difference means your evening could be their late night. Check the color-coded conversion table above — green hours indicate business hours in both zones, making it easy to find the ideal time.

Do SGT and JST ever have the same time?

No, SGT and JST are always 1 hour apart and never display the same clock time simultaneously. Neither timezone observes DST, so the difference is constant year-round with no seasonal variation. The 1 hour offset is determined by their fixed positions relative to the Prime Meridian (UTC). You can always rely on this consistent difference when planning across these timezones.

SGT to JST Converter

Convert Singapore Time to Japan Standard Time. See the hour-by-hour conversion table below.

Timezone Details

Singapore Time

8:10 AM

Friday, April 3, 2026

SGT (UTC+08:00)

Japan Standard Time

9:10 AM

Friday, April 3, 2026

JST (UTC+09:00)

Difference: +1 hour

SGT DST: No

JST DST: No

24-Hour Overview

SGT — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

JST — 24-hour overview

1a1a

4a4a

7a7a

10a10a

11a

12p

1p1p

4p4p

7p7p

10p10p

11p

12a

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

JST to SGT EST to JST JST to EST PST to JST JST to PST GMT to JST JST to GMT IST to JST JST to IST

Cities in These Timezones

SGT Cities

Singapore

JST Cities

Tokyo Osaka Fukuoka

More Tools

Compare SGT & JST Plan a Meeting (SGT & JST)See on Map

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

Singapore Time on Wikipedia Japan Standard Time on Wikipedia IANA Time Zone Database