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 Ottawa observe daylight saving time?

Yes. Ottawa is on EDT (UTC-4) now, and its clocks go back 1 hour on Sun, Nov 1, to EST (UTC-5).

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

4:00 AM in Ottawa, on the same day.

London to Ottawa Meeting Planner

Ottawa is 5 hours behind London right now. Their working days overlap for 3 hours today.

London · United Kingdom

1:07 PM

Sat, Oct 17 · BST · summer time

Ottawa · Canada

8:07 AM

Sat, Oct 17 · EDT · summer time

Best Meeting Times Between London and Ottawa

2:00 PM to 5:00 PM in London (9:00 AM to 12:00 PM in Ottawa). That's when both cities are inside working hours, 9 AM to 5 PM, giving 3 hours of overlap today.

Who's meeting

2 of 4 places

LondonOrganizerUnited Kingdom ·· summer time1:07PMnow
OttawaCanada ·· summer time8:07AMnow

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.

2:00PMBest · OptimalWorking hours in London (14:00) and Ottawa (09:00).
3:00PMOption 2 · OptimalWorking hours in London (15:00) and Ottawa (10:00).
4:00PMOption 3 · OptimalWorking hours in London (16:00) and Ottawa (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
OttawaEDT
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

London2:00 PM BSTSat, Oct 17
Ottawa9:00 AM EDTSat, Oct 17
UTC2026-10-17 13:00 UTC

What will it cost? Try the meeting cost calculator.

Time difference between London and Ottawa

Ottawa is 5 hours behind London right now: Ottawa is on EDT (UTC-4) and London on BST (UTC+1). That changes on Sun, Oct 25, when clocks go back in London: then Ottawa is 4 hours behind London.

Time difference between London and Ottawa over the next 12 months
From	Difference	Why
Now	Ottawa 5 hours behind	—
Sun, Oct 25	Ottawa 4 hours behind	Clocks go back in London
Sun, Nov 1	Ottawa 5 hours behind	Clocks go back in Ottawa
Sun, Mar 14, 2027	Ottawa 4 hours behind	Clocks go forward in Ottawa
Sun, Mar 28, 2027	Ottawa 5 hours behind	Clocks go forward in London

London is on Greenwich Mean Time. Ottawa is on Eastern Standard Time.

Frequently Asked Questions: London & Ottawa Scheduling

What is the time difference between London and Ottawa?: Ottawa is 5 hours behind London right now: Ottawa is on EDT (UTC-4) and London on BST (UTC+1). That changes on Sun, Oct 25, when clocks go back in London: then Ottawa is 4 hours behind London.
What is the best time to schedule a meeting between London and Ottawa?: 2:00 PM to 5:00 PM in London (9:00 AM to 12:00 PM in Ottawa). That's when both cities are inside working hours, 9 AM to 5 PM, giving 3 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 Ottawa observe daylight saving time?: Yes. Ottawa is on EDT (UTC-4) now, and its clocks go back 1 hour on Sun, Nov 1, to EST (UTC-5).
What time is it in Ottawa when it's 9 AM in London?: 4:00 AM in Ottawa, on the same day.

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