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).

Does Sydney observe daylight saving time?

Yes. Sydney is on AEDT (UTC+11) now, and its clocks go back 1 hour on Sun, Apr 4, 2027, to AEST (UTC+10).

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

12:00 AM in Sydney, the next day (Sun, Oct 18, when it's Sat, Oct 17 in Ottawa).

Ottawa to Sydney Meeting Planner

Sydney is 15 hours ahead of Ottawa right now. Their working days don't overlap today.

Ottawa · Canada

4:48 PM

Sat, Oct 17 · EDT · summer time

Sydney · Australia

7:48 AM

Sun, Oct 18 · AEDT · summer time

Best Meeting Times Between Ottawa and Sydney

No time falls inside working hours (9 AM to 5 PM) in both cities. The closest is 4:00 PM in Ottawa, which is 7:00 AM in Sydney; consider splitting into two shorter meetings or shifting someone's hours.

Who's meeting

2 of 4 places

OttawaOrganizerCanada ·· summer time4:48PMnow
SydneyAustralia ·· summer time7:48AMTomorrow · now

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Date in Ottawa

Working hours, everywhere

Best times to meet

Saturday, October 17, 2026, in Ottawa time.

4:00PMBest · GoodWorking hours in Ottawa (16:00); just outside working hours in Sydney (07:00, next day).
6:00PMOption 2 · GoodWorking hours in Sydney (09:00, next day); just outside working hours in Ottawa (18:00).
7:00PMOption 3 · GoodWorking hours in Sydney (10:00, next day); just outside working hours in Ottawa (19:00).

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
OttawaEDT
SydneyAEDT
UTC	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03

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

Your meeting

Ottawa4:00 PM EDTSat, Oct 17
Sydney7:00 AM AEDTSun, Oct 18
UTC2026-10-17 20:00 UTC

What will it cost? Try the meeting cost calculator.

Time difference between Ottawa and Sydney

Sydney is 15 hours ahead of Ottawa right now: Sydney is on AEDT (UTC+11) and Ottawa on EDT (UTC-4). That changes on Sun, Nov 1, when clocks go back in Ottawa: then Sydney is 16 hours ahead of Ottawa.

Time difference between Ottawa and Sydney over the next 12 months
From	Difference	Why
Now	Sydney 15 hours ahead	—
Sun, Nov 1	Sydney 16 hours ahead	Clocks go back in Ottawa
Sun, Mar 14, 2027	Sydney 15 hours ahead	Clocks go forward in Ottawa
Sun, Apr 4, 2027	Sydney 14 hours ahead	Clocks go back in Sydney
Sun, Oct 3, 2027	Sydney 15 hours ahead	Clocks go forward in Sydney

Ottawa is on Eastern Standard Time. Sydney is on Australian Eastern Standard Time.

Frequently Asked Questions: Ottawa & Sydney Scheduling

What is the time difference between Ottawa and Sydney?: Sydney is 15 hours ahead of Ottawa right now: Sydney is on AEDT (UTC+11) and Ottawa on EDT (UTC-4). That changes on Sun, Nov 1, when clocks go back in Ottawa: then Sydney is 16 hours ahead of Ottawa.
What is the best time to schedule a meeting between Ottawa and Sydney?: No time falls inside working hours (9 AM to 5 PM) in both cities. The closest is 4:00 PM in Ottawa, which is 7:00 AM in Sydney; consider splitting into two shorter meetings or shifting someone's hours.
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).
Does Sydney observe daylight saving time?: Yes. Sydney is on AEDT (UTC+11) now, and its clocks go back 1 hour on Sun, Apr 4, 2027, to AEST (UTC+10).
What time is it in Sydney when it's 9 AM in Ottawa?: 12:00 AM in Sydney, the next day (Sun, Oct 18, when it's Sat, Oct 17 in Ottawa).

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