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Time difference between London and Buenos Aires

Buenos Aires is 4 hours behind London

London, the United Kingdom is UTC · Buenos Aires, Argentina is UTC−3 — on standard time

The gap is not the same all year

Every converter gives one number for this pair. That number is right for most of the year and wrong for part of it, because London goes forward on the last Sunday in March and back on the last Sunday in October and Buenos Aires does not change its clocks.

London / Buenos Aires clocksDifferenceHow long
summer / standard4 hours behindabout 30 weeks
standard / standard3 hours behindabout 22 weeks

Buenos Aires stays put all year while London moves, so a meeting fixed in Buenos Aires's calendar shifts by an hour twice a year at London's end.

When they can both be at their desks

Nine-to-five in both cities overlaps for 4 hours — 1:00 PM to 5:00 PM in London, the same moment as 9:00 AM to 1:00 PM in Buenos Aires.

London to Buenos Aires, hour by hour

LondonBuenos Aires
12:00 AM8:00 PM (previous day)
1:00 AM9:00 PM (previous day)
2:00 AM10:00 PM (previous day)
3:00 AM11:00 PM (previous day)
4:00 AM12:00 AM
5:00 AM1:00 AM
6:00 AM2:00 AM
7:00 AM3:00 AM
8:00 AM4:00 AM
9:00 AM5:00 AM
10:00 AM6:00 AM
11:00 AM7:00 AM
12:00 PM8:00 AM
1:00 PM9:00 AM
2:00 PM10:00 AM
3:00 PM11:00 AM
4:00 PM12:00 PM
5:00 PM1:00 PM
6:00 PM2:00 PM
7:00 PM3:00 PM
8:00 PM4:00 PM
9:00 PM5:00 PM
10:00 PM6:00 PM
11:00 PM7:00 PM

On the usual gap of 4 hours.

Frequently asked questions

What is the time difference between London and Buenos Aires?

Buenos Aires is 4 hours behind London for most of the year. It is not the same all year — there is one other gap, because London goes forward on the last Sunday in March and back on the last Sunday in October and Buenos Aires does not change its clocks.

Is Buenos Aires ahead of London?

No — Buenos Aires is 4 hours behind. London is UTC and Buenos Aires is UTC−3 on standard time.

What time is 9 AM in London in Buenos Aires?

5:00 AM, on the usual gap.

When can London and Buenos Aires meet?

Standard nine-to-five hours overlap for 4 hours: 1:00 PM–5:00 PM in London, which is 9:00 AM–1:00 PM in Buenos Aires.

Other pairs

Every London pair · Every Buenos Aires pair · All city pairs · Time zones by abbreviation