How to read it
Paris 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: 16:00–17:00 in Paris, which is 07:00–08:00 in San Francisco.
Through the year
How the gap between Paris and San Francisco moves
San Francisco is 9h behind Paris today. Daylight saving moves it:
- San Francisco 9h behind Paris
- San Francisco 8h behind Paris
- Sun, 25 Oct 2026 Paris's clocks go back an hour. San Francisco is then 8h behind Paris.
- Sun, 1 Nov 2026 San Francisco's clocks go back an hour. San Francisco is then 9h behind Paris.
- Sun, 14 Mar 2027 San Francisco's clocks go forward an hour. San Francisco is then 8h behind Paris.
- Sun, 28 Mar 2027 Paris's clocks go forward an hour. San Francisco is then 9h behind Paris.
Hour by hour
Paris 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.
- Paris starts work 09:00 00:00 in San Francisco Asleep
- San Francisco starts work 09:00 18:00 in Paris Late
- Paris finishes work 18:00 09:00 in San Francisco At desk
- San Francisco finishes work 18:00 03:00 Wed in Paris Asleep
Show all 24 hours
| Paris | San Francisco |
|---|---|
| 00:00 Asleep | 15:00 Tue At desk |
| 01:00 Asleep | 16:00 Tue At desk |
| 02:00 Asleep | 17:00 Tue At desk |
| 03:00 Asleep | 18:00 Tue Late |
| 04:00 Asleep | 19:00 Tue Late |
| 05:00 Asleep | 20:00 Tue Late |
| 06:00 Asleep | 21:00 Tue Late |
| 07:00 Early | 22:00 Tue Asleep |
| 08:00 Early | 23:00 Tue Asleep |
| 09:00 At desk | 00:00 Asleep |
| 10:00 At desk | 01:00 Asleep |
| 11:00 At desk | 02:00 Asleep |
| 12:00 At desk | 03:00 Asleep |
| 13:00 At desk | 04:00 Asleep |
| 14:00 At desk | 05:00 Asleep |
| 15:00 At desk | 06:00 Asleep |
| 16:00 At desk | 07:00 Early |
| 17:00 At desk | 08:00 Early |
| 18:00 Late | 09:00 At desk |
| 19:00 Late | 10:00 At desk |
| 20:00 Late | 11:00 At desk |
| 21:00 Late | 12:00 At desk |
| 22:00 Asleep | 13:00 At desk |
| 23:00 Asleep | 14:00 At desk |
Questions
Questions people ask
What is the time difference between Paris and San Francisco?
San Francisco is 9h behind Paris (as of Wed, 21 Oct 2026). That changes on Sun, 25 Oct 2026, when Paris's clocks go back: then San Francisco is 8h behind Paris.
What is the best time for a call between Paris and San Francisco?
On a working day, the best time for a call is 16:00–17:00 in Paris (07:00–08:00 in San Francisco) until 24 Oct 2026 and from 1 Nov 2026 to 13 Mar 2027 and from 28 Mar 2027, and 17:00–18:00 in Paris (09:00–10:00 in San Francisco) from 25 Oct 2026 to 31 Oct 2026 and from 14 Mar 2027 to 27 Mar 2027.
Does Paris change its clocks?
Yes. Paris moves its clocks back an hour on Sun, 25 Oct 2026, and forward an hour on Sun, 28 Mar 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
Paris and…
- Paris and Mumbai
- Paris and Delhi
- Paris and Bengaluru
- Paris and Dubai
- Paris and Abu Dhabi
- Paris and Riyadh
- Paris and Doha
- Paris and Singapore
- Paris and Hong Kong
- Paris and Tokyo
- Paris and Sydney
- Paris and London
- Paris and Berlin
- Paris and Amsterdam
- Paris and New York
- Paris and Toronto
- Paris and Chicago
- Paris 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 Sydney
- San Francisco and London
- 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.