ICT to EST
Eastern Time is 11 hours behind Indochina Time for 238 days of the year, and takes 2 different values across the year.
ICT to EST conversion table
Every hour of the day at the difference that holds for 238 days of 2026 — 11 hours. See “When the difference changes” below for the rest.
| ICT | EST |
|---|---|
| 12:00 AM | 1:00 PM −1 day |
| 1:00 AM | 2:00 PM −1 day |
| 2:00 AM | 3:00 PM −1 day |
| 3:00 AM | 4:00 PM −1 day |
| 4:00 AM | 5:00 PM −1 day |
| 5:00 AM | 6:00 PM −1 day |
| 6:00 AM | 7:00 PM −1 day |
| 7:00 AM | 8:00 PM −1 day |
| 8:00 AM | 9:00 PM −1 day |
| 9:00 AM | 10:00 PM −1 day |
| 10:00 AM | 11:00 PM −1 day |
| 11:00 AM | 12:00 AM |
| ICT | EST |
|---|---|
| 12:00 PM | 1:00 AM |
| 1:00 PM | 2:00 AM |
| 2:00 PM | 3:00 AM |
| 3:00 PM | 4:00 AM |
| 4:00 PM | 5:00 AM |
| 5:00 PM | 6:00 AM |
| 6:00 PM | 7:00 AM |
| 7:00 PM | 8:00 AM |
| 8:00 PM | 9:00 AM |
| 9:00 PM | 10:00 AM |
| 10:00 PM | 11:00 AM |
| 11:00 PM | 12:00 PM |
Shared working hours
They do not overlap at all. A 09:00–17:00 working day in Indochina Time ends 3 hours before the Eastern Time one begins, so any live call sits outside somebody's working hours.
The shortest reach is the edges: early morning in ICT against late evening in EST, or the other way round.
When the difference changes
The two zones move their clocks on different dates, so the gap takes more than one value. These are the stretches of 2026:
| Dates | EST is | Why |
|---|---|---|
| 1 January – 8 March | 12 hours behind | — |
| 8 March – 1 November | 11 hours behind | Eastern Time clocks go forward one hour |
| 1 November – 1 January | 12 hours behind | Eastern Time clocks go back one hour |
Dates are Indochina Time local dates for 2026. Transition dates move by a few days from year to year; the rule each country follows does not.
About Indochina Time
Indochina Time is a fixed UTC+7 shared by Thailand, Vietnam, Cambodia and Laos. Nothing in the zone changes its clock, so every gap on this page holds for the whole year.
Cities on this clock: Jakarta, Bangkok, Ho Chi Minh City, Hanoi, Phnom Penh.
About Eastern Time
Eastern Time is the most populous North American zone and the one most business hours are quoted in. It is UTC−5 as EST and UTC−4 as EDT. Because it changes on US dates rather than European ones, its gap to London and to Central Europe is not constant — there are two short stretches each year when it is an hour narrower than usual, and they are the reason this pair's table has more than one row.
Cities on this clock: New York, Philadelphia, Boston, Miami, Atlanta, Toronto, Montreal, Ottawa.
How the difference is worked out
The gap between Indochina Time and Eastern Time is not one number. The two zones change their clocks on different dates, so for part of the year the difference is 11 hours and for the rest it is something else — the table above lists each stretch of 2026 with the date it starts and which country's clocks moved.
With both zones on their own standard time — daylight saving not in force anywhere — Eastern Time is 12 hours behind Indochina Time. That figure never changes; everything else on this page follows from it plus whichever clocks have moved.
Every figure here comes from the IANA time zone database via your browser's own Intl engine, using the zone ids Asia/Bangkok and America/New_York. Nothing is looked up on a server and nothing about your visit is recorded.
Is EST ahead of or behind ICT?
Eastern Time is 11 hours behind Indochina Time for 238 days of the year, and takes 2 different values across the year. The gap moves because the two zones change their clocks on different dates — on 8 March, Eastern Time clocks go forward one hour; on 1 November, Eastern Time clocks go back one hour (dates for 2026).
What time is 9 AM ICT in EST?
9:00 AM ICT is 10:00 PM EST the previous day for most of the year — see the table above for the 3 stretches of 2026 the gap holds different values.
When can Indochina Time and Eastern Time meet?
They do not overlap. A 09:00–17:00 working day in Indochina Time ends 3 hours before the Eastern Time one begins, so a call has to sit outside someone's working hours — early morning in Indochina Time or late evening in Eastern Time is usually the shortest reach.
What does ICT stand for?
ICT is Indochina Time, also written Bangkok time, Thailand time, Vietnam time. Indochina Time is a fixed UTC+7 shared by Thailand, Vietnam, Cambodia and Laos. Nothing in the zone changes its clock, so every gap on this page holds for the whole year.