WIB to EST
Eastern Time is 11 hours behind Western Indonesia Time for 238 days of the year, and takes 2 different values across the year.
WIB 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.
| WIB | 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 |
| WIB | 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 Western Indonesia 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 WIB 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 Western Indonesia Time local dates for 2026. Transition dates move by a few days from year to year; the rule each country follows does not.
About Western Indonesia Time
Indonesia spans three zones; WIB is the western one, at a fixed UTC+7, and it covers Jakarta, Sumatra and most of the population. Central Indonesia is an hour ahead and the east two, so "Indonesia time" is only unambiguous once you know which.
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 Western Indonesia 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 Western Indonesia 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/Jakarta and America/New_York. Nothing is looked up on a server and nothing about your visit is recorded.
Is EST ahead of or behind WIB?
Eastern Time is 11 hours behind Western Indonesia 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 WIB in EST?
9:00 AM WIB 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 Western Indonesia Time and Eastern Time meet?
They do not overlap. A 09:00–17:00 working day in Western Indonesia Time ends 3 hours before the Eastern Time one begins, so a call has to sit outside someone's working hours — early morning in Western Indonesia Time or late evening in Eastern Time is usually the shortest reach.
What does WIB stand for?
WIB is Western Indonesia Time, also written Jakarta time, Indonesia time. Indonesia spans three zones; WIB is the western one, at a fixed UTC+7, and it covers Jakarta, Sumatra and most of the population. Central Indonesia is an hour ahead and the east two, so "Indonesia time" is only unambiguous once you know which.