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).

Does Rio de Janeiro observe daylight saving time?

No. Rio de Janeiro stays on BRT (UTC-3) all year, so its clocks don't change.

What time is it in Rio de Janeiro when it's 9 AM in London?

5:00 AM in Rio de Janeiro, on the same day.

London to Rio de Janeiro Meeting Planner

Rio de Janeiro is 4 hours behind London right now. Their working days overlap for 4 hours today.

London · United Kingdom

10:41 PM

Sat, Oct 17 · BST · summer time

Rio de Janeiro · Brazil

6:41 PM

Sat, Oct 17 · BRT

Best Meeting Times Between London and Rio de Janeiro

1:00 PM to 5:00 PM in London (9:00 AM to 1:00 PM in Rio de Janeiro). 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

LondonOrganizerUnited Kingdom ·· summer time10:41PMnow
Rio de JaneiroBrazil ·6:41PMnow

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 London

Working hours, everywhere

Best times to meet

Saturday, October 17, 2026, in London time.

1:00PMBest · OptimalWorking hours in London (13:00) and Rio de Janeiro (09:00).
2:00PMOption 2 · OptimalWorking hours in London (14:00) and Rio de Janeiro (10:00).
3:00PMOption 3 · OptimalWorking hours in London (15:00) and Rio de Janeiro (11:00).

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
LondonBST
Rio de JaneiroUTC-3
UTC	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22

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

Your meeting

London1:00 PM BSTSat, Oct 17
Rio de Janeiro9:00 AM UTC-3Sat, Oct 17
UTC2026-10-17 12:00 UTC

What will it cost? Try the meeting cost calculator.

Time difference between London and Rio de Janeiro

Rio de Janeiro is 4 hours behind London right now: Rio de Janeiro is on BRT (UTC-3) and London on BST (UTC+1). That changes on Sun, Oct 25, when clocks go back in London: then Rio de Janeiro is 3 hours behind London.

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

London is on Greenwich Mean Time. Rio de Janeiro is on Brasilia Standard Time.

Frequently Asked Questions: London & Rio de Janeiro Scheduling

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

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