What is the time difference between GMT and ICT?

Indochina Time (ICT) is 6 hours ahead of Greenwich Mean Time (GMT). GMT uses a UTC offset of UTC+1, while ICT uses UTC+7. For example, when it's 9:00 AM in GMT, it's 3:00 PM in ICT. Note that this difference may shift by one hour during daylight saving time transitions if GMT observes DST. Use the conversion table above to see the exact time for each hour of the day.

How do I convert GMT to ICT?

To convert GMT to ICT, add 6 hours to the GMT time. For example, 9:00 AM GMT is 3:00 PM ICT, and 5:00 PM GMT is 11:00 PM ICT. Keep in mind that during daylight saving time transitions, the offset between these timezones may temporarily change by one hour. You can also use the interactive converter above for quick, accurate results.

What time is it in ICT when it's noon in GMT?

When it's 12:00 PM (noon) in GMT, it's 6:00 PM in ICT. This is because ICT is 6 hours ahead of GMT. Similarly, when it's 6:00 PM in GMT, it's 12:00 AM in ICT. During daylight saving time transitions, these times may shift by one hour, so always verify the current offset. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours ahead is ICT from GMT?

ICT is 6 hours ahead of GMT. This means when it's 9:00 AM in GMT, it's 3:00 PM in ICT, and when it's midnight in GMT, it's 6:00 AM in ICT. The exact difference can vary by one hour during daylight saving time transitions. The conversion table above provides a complete hour-by-hour mapping.

Is ICT ahead or behind GMT?

ICT is ahead of GMT by 6 hours. Clocks in ICT show a later time than GMT, meaning the day starts earlier in ICT relative to GMT. For example, when it's morning in GMT, it's already afternoon or evening in ICT. This gap may change by one hour during DST transitions.

Does GMT observe daylight saving time?

Yes, Greenwich Mean Time observes daylight saving time. During DST, the abbreviation changes to BST and clocks move forward by one hour, typically in spring. Clocks then fall back in autumn, returning to standard GMT time. This means the UTC offset for GMT shifts between two values depending on the season. Check our DST change calendar for exact transition dates that may affect your GMT to ICT conversions.

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 to ICT more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

What is the best time to call from GMT to ICT?

The best time for a call between GMT and ICT is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in ICT during their work day, call between 3:00 AM and 11:00 AM your GMT time. Avoid calling too early or late, as the 6 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.

When does daylight saving time change in GMT?

Daylight saving time transitions vary by year and region. Greenwich Mean Time observes DST, which typically shifts clocks forward by one hour in spring ("spring forward") and back in fall ("fall back"). During these transition periods, the time difference between GMT and ICT may temporarily change by one hour, which can cause confusion for scheduled meetings or calls. It's important to double-check your conversions around transition dates, especially if the two timezones switch on different dates. Check our DST change calendar for exact transition dates in the current year.

Do GMT and ICT ever have the same time?

No, GMT and ICT never show the same time because their base UTC offsets are different. However, because GMT observes daylight saving time and ICT does not, the time difference between them changes by one hour during DST transitions. This means the gap narrows or widens depending on the season, but the two clocks never align. Always verify the current offset around DST transition dates to avoid scheduling errors.

GMT to ICT Converter

Convert Greenwich Mean Time to Indochina Time. See the hour-by-hour conversion table below.

Upcoming DST Change

UK Time (BST) will fall back on October 25. Clocks will shift by 1 hour (BST → GMT).

View all DST changes

Timezone Details

Greenwich Mean Time

2:43 PM

Wednesday, October 21, 2026

BST (UTC+01:00)

Indochina Time

8:43 PM

Wednesday, October 21, 2026

ICT (UTC+07:00)

Difference: +6 hours

BST DST: Yes (BST)

ICT DST: No

24-Hour Overview

BST — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

ICT — 24-hour overview

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

12a12a

3a3a

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

ICT to GMT EST to GMT GMT to EST PST to GMT GMT to PST GMT to IST IST to GMT GMT to CET CET to GMT

Cities in These Timezones

GMT Cities

London Manchester Edinburgh

ICT Cities

Bangkok Phuket Chiang Mai

More Tools

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

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

Greenwich Mean Time on Wikipedia Indochina Time on Wikipedia IANA Time Zone Database