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AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Piedras Negras vs Buenos Aires

Piedras Negras keeps CDT (UTC−5) and Buenos Aires keeps UTC−3 (UTC−3) today. Buenos Aires is 2 hours ahead of Piedras Negras; the rows below read both clocks live.

The working day, side by side

Hours shaded in both rows are inside working hours in both cities: 11:00–18:00 in Buenos Aires (09:00–16:00 your time).

Piedras Negras and Buenos Aires hour by hour, with the working-hour overlap shaded
City00:00 in Piedras Negras01:00 in Piedras Negras02:00 in Piedras Negras03:00 in Piedras Negras04:00 in Piedras Negras05:00 in Piedras Negras06:00 in Piedras Negras07:00 in Piedras Negras08:00 in Piedras Negras09:00 in Piedras Negras10:00 in Piedras Negras11:00 in Piedras Negras12:00 in Piedras Negras13:00 in Piedras Negras14:00 in Piedras Negras15:00 in Piedras Negras16:00 in Piedras Negras17:00 in Piedras Negras18:00 in Piedras Negras19:00 in Piedras Negras20:00 in Piedras Negras21:00 in Piedras Negras22:00 in Piedras Negras23:00 in Piedras Negras
Piedras Negras——000102030405060708091011121314151617181920212223
Buenos Aires——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Piedras Negras and Buenos Aires

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Piedras Negras, Buenos Aires and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

09:00 in Piedras Negras
Inside working hours on both sides
11:00 in Buenos Aires
10:00 in Piedras Negras
Inside working hours on both sides
12:00 in Buenos Aires
11:00 in Piedras Negras
Inside working hours on both sides
13:00 in Buenos Aires
12:00 in Piedras Negras
Inside working hours on both sides
14:00 in Buenos Aires

Where daylight saving pulls them apart

Piedras Negras next changes on Sunday 1 November 2026. Between those two dates the gap between the cities is an hour different from the one shown above — which is exactly when a recurring meeting drifts. Every date we track is on the daylight saving page.

Also useful

Common questions

How many hours ahead is Buenos Aires of Piedras Negras?

Buenos Aires is 2 hours ahead of Piedras Negras right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Piedras Negras and Buenos Aires?

Any hour in 09:00–16:00 Piedras Negras time is inside working hours in both cities.

Do Piedras Negras and Buenos Aires change clocks on the same date?

Only one of them does, so the gap between them changes twice a year even though neither city moved relative to the sun.