ART to ET Time Converter
ET is 1 hour behind ART. ART is UTC-3:00, and The US East Coast is currently on EDT (UTC-4:00).
Best Time to Call Between ART and ET
Both zones are inside normal business hours between 10:00 AM and 5:00 PM ART — that's 9:00 AM to 4:00 PM ET. That's a 7-hour window.
both at work ART only ET only neither — hours along the strip are ART.
Common Times Converted
ART on the left, ET on the right.
ART to ET: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| ART | ET | Working hours |
|---|---|---|
| 12:00 AM | 11:00 PM prev day | — |
| 1:00 AM | 12:00 AM | — |
| 2:00 AM | 1:00 AM | — |
| 3:00 AM | 2:00 AM | — |
| 4:00 AM | 3:00 AM | — |
| 5:00 AM | 4:00 AM | — |
| 6:00 AM | 5:00 AM | — |
| 7:00 AM | 6:00 AM | — |
| 8:00 AM | 7:00 AM | — |
| 9:00 AM | 8:00 AM | ART only |
| 10:00 AM | 9:00 AM | Both zones |
| 11:00 AM | 10:00 AM | Both zones |
| 12:00 PM | 11:00 AM | Both zones |
| 1:00 PM | 12:00 PM | Both zones |
| 2:00 PM | 1:00 PM | Both zones |
| 3:00 PM | 2:00 PM | Both zones |
| 4:00 PM | 3:00 PM | Both zones |
| 5:00 PM | 4:00 PM | ET only |
| 6:00 PM | 5:00 PM | — |
| 7:00 PM | 6:00 PM | — |
| 8:00 PM | 7:00 PM | — |
| 9:00 PM | 8:00 PM | — |
| 10:00 PM | 9:00 PM | — |
| 11:00 PM | 10:00 PM | — |
What ART and ET Actually Are
ART — Argentina Time
Buenos Aires, Córdoba, Rosario. Standing at UTC-3:00 as written, and the region does not change its clocks, so that offset holds all year. Argentina does not observe daylight saving, so this offset is fixed year-round.
Argentina has changed its time zone rules more than a dozen times since 1930 and abandoned daylight saving in 2009.
ET — Eastern Time
New York, Toronto, Washington DC, Atlanta, Miami, Boston. Standing at UTC-5:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to EST.
Eastern Time covers roughly half the US population and, because of that, is the zone most American business defaults to when nobody specifies one.
What This Means in Practice
This gap is not fixed
ET changes its clocks and ART does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, November 1, 2026 unless someone resets it.
Close enough to share a working day
At only 1 hour apart, the two working days overlap almost completely. Scheduling is barely constrained by the difference.
Major Cities in Each Zone
Cities on ART
Cities on ET
Frequently Asked Questions
What is the time difference between ART and ET?
ET is 1 hour behind ART. That is the live figure. Taken strictly as written, the gap between ART and ET is 2 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM ART in ET?
9:00 AM ART is 8:00 AM ET.
What are the best hours to schedule a call between ART and ET?
Between 10:00 AM and 5:00 PM ART, which is 9:00 AM to 4:00 PM ET. Both sides are inside normal business hours through that window.
Does the difference between ART and ET change during the year?
Yes. ET observes daylight saving and ART does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, November 1, 2026.
Does ART always mean Argentina Time?
Argentina does not observe daylight saving, so this offset is fixed year-round.