Does Buenos Aires observe daylight saving time?

No. Buenos Aires stays on ART (UTC-3) all year, so its clocks don't change.

Does London observe daylight saving time?

Yes. London is on BST (UTC+1) now, and its clocks go back 1 hour on Sun, Oct 25, to GMT (UTC+0).

What time is it in London when it's 9 AM in Buenos Aires?

1:00 PM in London, on the same day.

Buenos Aires to London Meeting Planner

London is 4 hours ahead of Buenos Aires right now. Their working days overlap for 4 hours today.

Buenos Aires · Argentina

6:40 PM

Sat, Oct 17 · ART

London · United Kingdom

10:40 PM

Sat, Oct 17 · BST · summer time

Best Meeting Times Between Buenos Aires and London

9:00 AM to 1:00 PM in Buenos Aires (1:00 PM to 5:00 PM in London). That's when both cities are inside working hours, 9 AM to 5 PM, giving 4 hours of overlap today.

Who's meeting

2 of 4 places

Buenos AiresOrganizerArgentina ·6:40PMnow
LondonUnited Kingdom ·· summer time10:40PMnow

Add a city

Add up to 4 places by city, country, time zone or abbreviation, like Tokyo, India or JST. Press "/" to jump here.

Date in Buenos Aires

Working hours, everywhere

Best times to meet

Saturday, October 17, 2026, in Buenos Aires time.

12:00PMBest · OptimalWorking hours in Buenos Aires (12:00) and London (16:00).
11:00AMOption 2 · OptimalWorking hours in Buenos Aires (11:00) and London (15:00).
10:00AMOption 3 · OptimalWorking hours in Buenos Aires (10:00) and London (14:00).

The whole day

Pick any slot in the Fit row, or use the arrow keys there, to make it the meeting time.

Each column is a one-hour slot of the first place's day. The Fit row grades how well the slot suits everyone; each row shows the local time and whether it's working hours there.
Fit
Buenos AiresUTC-3
LondonBST
UTC	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02

Working hours (09–17)Just outside (07–09, 17–20)Late evening (20–23)NightFit: optimal, good, possible, poor

Your meeting

Buenos Aires12:00 PM UTC-3Sat, Oct 17
London4:00 PM BSTSat, Oct 17
UTC2026-10-17 15:00 UTC

What will it cost? Try the meeting cost calculator.

Time difference between Buenos Aires and London

London is 4 hours ahead of Buenos Aires right now: London is on BST (UTC+1) and Buenos Aires on ART (UTC-3). That changes on Sun, Oct 25, when clocks go back in London: then London is 3 hours ahead of Buenos Aires.

Time difference between Buenos Aires and London over the next 12 months
From	Difference	Why
Now	London 4 hours ahead	—
Sun, Oct 25	London 3 hours ahead	Clocks go back in London
Sun, Mar 28, 2027	London 4 hours ahead	Clocks go forward in London

Buenos Aires is on Argentina Standard Time. London is on Greenwich Mean Time.

Frequently Asked Questions: Buenos Aires & London Scheduling

What is the time difference between Buenos Aires and London?: London is 4 hours ahead of Buenos Aires right now: London is on BST (UTC+1) and Buenos Aires on ART (UTC-3). That changes on Sun, Oct 25, when clocks go back in London: then London is 3 hours ahead of Buenos Aires.
What is the best time to schedule a meeting between Buenos Aires and London?: 9:00 AM to 1:00 PM in Buenos Aires (1:00 PM to 5:00 PM in London). That's when both cities are inside working hours, 9 AM to 5 PM, giving 4 hours of overlap today.
Does Buenos Aires observe daylight saving time?: No. Buenos Aires stays on ART (UTC-3) all year, so its clocks don't change.
Does London observe daylight saving time?: Yes. London is on BST (UTC+1) now, and its clocks go back 1 hour on Sun, Oct 25, to GMT (UTC+0).
What time is it in London when it's 9 AM in Buenos Aires?: 1:00 PM in London, on the same day.

Or see every city pair, or plan with more places in the meeting planner.