PT to ART Time Converter
ART is 4 hours ahead of PT. The US West Coast is currently on PDT (UTC-7:00), and ART is UTC-3:00.
Best Time to Call Between PT and ART
Both zones are inside normal business hours between 9:00 AM and 1:00 PM PT — that's 1:00 PM to 5:00 PM ART. That's a 4-hour window.
both at work PT only ART only neither — hours along the strip are PT.
Common Times Converted
PT on the left, ART on the right.
PT to ART: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| PT | ART | Working hours |
|---|---|---|
| 12:00 AM | 4:00 AM | — |
| 1:00 AM | 5:00 AM | — |
| 2:00 AM | 6:00 AM | — |
| 3:00 AM | 7:00 AM | — |
| 4:00 AM | 8:00 AM | — |
| 5:00 AM | 9:00 AM | ART only |
| 6:00 AM | 10:00 AM | ART only |
| 7:00 AM | 11:00 AM | ART only |
| 8:00 AM | 12:00 PM | ART only |
| 9:00 AM | 1:00 PM | Both zones |
| 10:00 AM | 2:00 PM | Both zones |
| 11:00 AM | 3:00 PM | Both zones |
| 12:00 PM | 4:00 PM | Both zones |
| 1:00 PM | 5:00 PM | PT only |
| 2:00 PM | 6:00 PM | PT only |
| 3:00 PM | 7:00 PM | PT only |
| 4:00 PM | 8:00 PM | PT only |
| 5:00 PM | 9:00 PM | — |
| 6:00 PM | 10:00 PM | — |
| 7:00 PM | 11:00 PM | — |
| 8:00 PM | 12:00 AM next day | — |
| 9:00 PM | 1:00 AM next day | — |
| 10:00 PM | 2:00 AM next day | — |
| 11:00 PM | 3:00 AM next day | — |
What PT and ART Actually Are
PT — Pacific Time
Los Angeles, San Francisco, Seattle, Las Vegas, Vancouver. Standing at UTC-8:00 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 PST.
Pacific Time anchors the US technology industry, so a great deal of software and scheduling convention is written implicitly around it.
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.
What This Means in Practice
This gap is not fixed
PT 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.
Major Cities in Each Zone
Cities on PT
Cities on ART
Frequently Asked Questions
What is the time difference between PT and ART?
ART is 4 hours ahead of PT. That is the live figure. Taken strictly as written, the gap between PT and ART is 5 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM PT in ART?
9:00 AM PT is 1:00 PM ART.
What are the best hours to schedule a call between PT and ART?
Between 9:00 AM and 1:00 PM PT, which is 1:00 PM to 5:00 PM ART. Both sides are inside normal business hours through that window.
Does the difference between PT and ART change during the year?
Yes. PT 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.