How to read it
Sydney and San Francisco, side by side
Each row is one city's day, half an hour to a square, lined up by the hours along the bottom.
- 1Filled: at the desk, 9:00 to 18:00 where that city is.
- 2Grey: up early, up late, or the weekend.
- 3Outline: asleep.
- 4Red band: your slot. Read straight down to see the same moment in every city.
- 5A marks the best time for everyone; B, when there is one, the next best.
The red band is the best time to call on Wed, 21 Oct 2026: 09:00–10:00 in Sydney, which is 15:00–16:00 in San Francisco.
Through the year
How the gap between Sydney and San Francisco moves
San Francisco is 18h behind Sydney today. Daylight saving moves it:
- San Francisco 18h behind Sydney
- San Francisco 19h behind Sydney
- San Francisco 17h behind Sydney
- Sun, 1 Nov 2026 San Francisco's clocks go back an hour. San Francisco is then 19h behind Sydney.
- Sun, 14 Mar 2027 San Francisco's clocks go forward an hour. San Francisco is then 18h behind Sydney.
- Sun, 4 Apr 2027 Sydney's clocks go back an hour. San Francisco is then 17h behind Sydney.
- Sun, 3 Oct 2027 Sydney's clocks go forward an hour. San Francisco is then 18h behind Sydney.
Hour by hour
Sydney to San Francisco time, hour by hour
On a working day (Wed, 21 Oct 2026), with working hours of 9:00 to 18:00 in both cities.
- Sydney starts work 09:00 15:00 Tue in San Francisco At desk
- San Francisco starts work 09:00 03:00 Wed in Sydney Asleep
- Sydney finishes work 18:00 00:00 in San Francisco Asleep
- San Francisco finishes work 18:00 12:00 Wed in Sydney At desk
Show all 24 hours
| Sydney | San Francisco |
|---|---|
| 00:00 Asleep | 06:00 Tue Asleep |
| 01:00 Asleep | 07:00 Tue Early |
| 02:00 Asleep | 08:00 Tue Early |
| 03:00 Asleep | 09:00 Tue At desk |
| 04:00 Asleep | 10:00 Tue At desk |
| 05:00 Asleep | 11:00 Tue At desk |
| 06:00 Asleep | 12:00 Tue At desk |
| 07:00 Early | 13:00 Tue At desk |
| 08:00 Early | 14:00 Tue At desk |
| 09:00 At desk | 15:00 Tue At desk |
| 10:00 At desk | 16:00 Tue At desk |
| 11:00 At desk | 17:00 Tue At desk |
| 12:00 At desk | 18:00 Tue Late |
| 13:00 At desk | 19:00 Tue Late |
| 14:00 At desk | 20:00 Tue Late |
| 15:00 At desk | 21:00 Tue Late |
| 16:00 At desk | 22:00 Tue Asleep |
| 17:00 At desk | 23:00 Tue Asleep |
| 18:00 Late | 00:00 Asleep |
| 19:00 Late | 01:00 Asleep |
| 20:00 Late | 02:00 Asleep |
| 21:00 Late | 03:00 Asleep |
| 22:00 Asleep | 04:00 Asleep |
| 23:00 Asleep | 05:00 Asleep |
Questions
Questions people ask
What is the time difference between Sydney and San Francisco?
San Francisco is 18h behind Sydney (as of Wed, 21 Oct 2026). That changes on Sun, 1 Nov 2026, when San Francisco's clocks go back: then San Francisco is 19h behind Sydney.
What is the best time for a call between Sydney and San Francisco?
On a working day, the best time for a call is 09:00–10:00 in Sydney (15:00–16:00 in San Francisco) until 31 Oct 2026 and from 14 Mar 2027 to 3 Apr 2027 and from 3 Oct 2027, and 09:00–10:00 in Sydney (14:00–15:00 in San Francisco) from 1 Nov 2026 to 13 Mar 2027, and 09:00–10:00 in Sydney (16:00–17:00 in San Francisco) from 4 Apr 2027 to 2 Oct 2027.
Does Sydney change its clocks?
Yes. Sydney moves its clocks back an hour on Sun, 4 Apr 2027, and forward an hour on Sun, 3 Oct 2027.
Does San Francisco change its clocks?
Yes. San Francisco moves its clocks back an hour on Sun, 1 Nov 2026, and forward an hour on Sun, 14 Mar 2027.
More city pairs
Compare more cities
Sydney and…
- Sydney and Mumbai
- Sydney and Delhi
- Sydney and Bengaluru
- Sydney and Dubai
- Sydney and Abu Dhabi
- Sydney and Riyadh
- Sydney and Doha
- Sydney and Singapore
- Sydney and Hong Kong
- Sydney and Tokyo
- Sydney and London
- Sydney and Paris
- Sydney and Berlin
- Sydney and Amsterdam
- Sydney and New York
- Sydney and Toronto
- Sydney and Chicago
- Sydney and Los Angeles
San Francisco and…
- San Francisco and Mumbai
- San Francisco and Delhi
- San Francisco and Bengaluru
- San Francisco and Dubai
- San Francisco and Abu Dhabi
- San Francisco and Riyadh
- San Francisco and Doha
- San Francisco and Singapore
- San Francisco and Hong Kong
- San Francisco and Tokyo
- San Francisco and London
- San Francisco and Paris
- San Francisco and Berlin
- San Francisco and Amsterdam
- San Francisco and New York
- San Francisco and Toronto
- San Francisco and Chicago
- San Francisco and Los Angeles
From the team behind 10:10
Running an event across time zones?
C4E has spent twenty years running conferences, dealer meets and offsites in more than 40 countries, with clients, speakers and crews in different time zones. 10:10 is one of the tools we built for our own shows. It is free, with no account and nothing upsold.