What is the time difference between ICT and JST?

Japan Standard Time (JST) is 2 hours ahead of Indochina Time (ICT). ICT uses a UTC offset of UTC+7, while JST uses UTC+9. For example, when it's 9:00 AM in ICT, it's 11:00 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 ICT to JST?

To convert ICT to JST, add 2 hours to the ICT time. For example, 9:00 AM ICT is 11:00 AM JST, and 5:00 PM ICT is 7:00 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 ICT?

When it's 12:00 PM (noon) in ICT, it's 2:00 PM in JST. This is because JST is 2 hours ahead of ICT. Similarly, when it's 6:00 PM in ICT, it's 8:00 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 ICT?

JST is 2 hours ahead of ICT. This means when it's 9:00 AM in ICT, it's 11:00 AM in JST, and when it's midnight in ICT, it's 2:00 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 ICT?

JST is ahead of ICT by 2 hours. Clocks in JST show a later time than ICT, meaning the day starts earlier in JST relative to ICT. For example, when it's morning in ICT, it's later in the morning in JST. This difference stays the same year-round.

Does ICT observe daylight saving time?

No, Indochina Time does not observe daylight saving time. The UTC offset of UTC+7 remains the same year-round, making time conversions from ICT 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 ICT to JST?

The best time for a call between ICT 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 7:00 AM and 3:00 PM your ICT time. Avoid calling too early or late, as the 2 hours 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 ICT and JST ever have the same time?

No, ICT and JST are always 2 hours 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 2 hours 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.

ICT to JST Converter

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

Timezone Details

Indochina Time

11:38 AM

Saturday, April 4, 2026

ICT (UTC+07:00)

Japan Standard Time

1:38 PM

Saturday, April 4, 2026

JST (UTC+09:00)

Difference: +2 hours

ICT DST: No

JST DST: No

24-Hour Overview

ICT — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

JST — 24-hour overview

2a2a

5a5a

8a8a

10a

11a11a

12p

2p2p

5p5p

8p8p

10p

11p11p

12a

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

JST to ICT 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

ICT Cities

Bangkok Phuket Chiang Mai

JST Cities

Tokyo Osaka Fukuoka

More Tools

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

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

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