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Global ClockTime zone converter & meeting planner
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09
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18
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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 Rennes vs Buenos Aires

Rennes keeps CEST (UTC+2) and Buenos Aires keeps UTC−3 (UTC−3) today. Buenos Aires is 5 hours behind Rennes; 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: 09:00–13:00 in Buenos Aires (14:00–18:00 your time).

Rennes and Buenos Aires hour by hour, with the working-hour overlap shaded
City00:00 in Rennes01:00 in Rennes02:00 in Rennes03:00 in Rennes04:00 in Rennes05:00 in Rennes06:00 in Rennes07:00 in Rennes08:00 in Rennes09:00 in Rennes10:00 in Rennes11:00 in Rennes12:00 in Rennes13:00 in Rennes14:00 in Rennes15:00 in Rennes16:00 in Rennes17:00 in Rennes18:00 in Rennes19:00 in Rennes20:00 in Rennes21:00 in Rennes22:00 in Rennes23:00 in Rennes
Rennes——000102030405060708091011121314151617181920212223
Buenos Aires——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Rennes 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 Rennes, Buenos Aires and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

14:00 in Rennes
Inside working hours on both sides
09:00 in Buenos Aires
15:00 in Rennes
Inside working hours on both sides
10:00 in Buenos Aires
16:00 in Rennes
Inside working hours on both sides
11:00 in Buenos Aires
17:00 in Rennes
Inside working hours on both sides
12:00 in Buenos Aires

Where daylight saving pulls them apart

Rennes next changes on Sunday 25 October 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 Rennes?

Buenos Aires is 5 hours behind Rennes right now. The gap is not fixed: it moves whenever either side changes its clocks.

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

Any hour in 14:00–18:00 Rennes time is inside working hours in both cities.

Do Rennes 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.