EST to ART Converter

The quick answer: ART is always 2 hours ahead of EST as a fixed-offset comparison, but the US Eastern zone runs on EDT (UTC−4) from March to November while Argentina stays on ART (UTC−3) year-round, so the real difference is 1 hour during the North American summer. For a call or meeting, Buenos Aires is 1 to 2 hours ahead of New York depending on the date.

What is the time difference between EST and ART?

EST sits at UTC−5. ART sits at UTC−3. As abbreviations, ART is always 2 hours ahead of EST. But the label "EST" only applies to the Eastern zone from early November to mid-March. The rest of the year, the US East Coast uses EDT (UTC−4), which is just 1 hour behind ART.

What to do: Check whether New York is on EST or EDT before scheduling. If the date falls between March and November, subtract 1 hour from the usual 2-hour calculation. From November to March, use the full 2-hour difference.

When does the EST to ART gap change?

Argentina does not observe daylight saving time. Buenos Aires stays on ART (UTC−3) all year. The US Eastern zone changes twice annually:

  • Second Sunday in March at 02:00 local: clocks go forward 60 minutes, EST becomes EDT. The gap with ART narrows from 2 hours to 1 hour.
  • First Sunday in November at 02:00 local: clocks go back 60 minutes, EDT becomes EST. The gap widens back to 2 hours.

For 2026: the gap is 2 hours from 1 January through 7 March, then 1 hour from 8 March through 31 October, then 2 hours from 1 November through 31 December. That is 66 days at 2 hours, 238 days at 1 hour, then 61 days at 2 hours.

For 2027: 2 hours from 1 January through 13 March, 1 hour from 14 March through 6 November, then 2 hours from 7 November onward.

How many working hours overlap between EST and ART?

When ART is 2 hours ahead of EST, a 09:00 to 17:00 workday in New York overlaps with Buenos Aires for 6 hours. The shared window runs 09:00 to 15:00 EST.

When ART is 1 hour ahead of EDT, the overlap stretches to 7 hours. The shared window runs 09:00 to 16:00 EST.

The mistake people make: They assume the difference is always 2 hours because they remember "EST is UTC−5, ART is UTC−3." That holds for the abbreviations, but the US East Coast is not on EST for 238 days of the year. Book a recurring meeting in July using a 2-hour offset and you will be wrong for eight months.

What to do instead: For a one-off call in the next few weeks, check the current offset and move on. For recurring meetings, automated systems, or calendar invites that span a DST transition, set the meeting in UTC or use the IANA zone names America/New_York and America/Argentina/Buenos_Aires. Let the calendar software handle the rest.