Rio de Janeiro – San Francisco: the working hours you share
San Francisco is 4 hours behind Rio de Janeiro. On a 09:00–18:00 working day they share 5 hours: 13:00–18:00 in Rio de Janeiro, 09:00–14:00 in San Francisco.
- Difference−4 h
- Shared working hours5 h
- From Nov 1−5 h
The two days, side by side
Each row is one city's day in its own clock, from Rio de Janeiro's midnight. The marked band is the working hour both of them are inside.
shared working hour at work awake asleep
Best times to meet
One-hour windows, ranked by how well they fit both working days.
| Rio de Janeiro | San Francisco | Window |
|---|---|---|
| 13:00 at work | 09:00 at work | shared working hour |
| 15:00 at work | 11:00 at work | shared working hour |
| 17:00 at work | 13:00 at work | shared working hour |
Through the year: what daylight saving does
The difference is not one number. It changes 2 times in the next twelve months, because the two sides switch their clocks on different dates:
| From | to | Difference | Shared working hours | Window |
|---|---|---|---|---|
| August 28, 2026 | October 31, 2026 | −4 h | 5 h | 13:00–18:00 / 09:00–14:00 |
| November 1, 2026 | March 13, 2027 | −5 h | 4 h | 14:00–18:00 / 09:00–13:00 |
| March 14, 2027 | October 1, 2027 | −4 h | 5 h | 13:00–18:00 / 09:00–14:00 |
The board opens with both cities already added. Change either side's working hours and the answer follows.
Open this on the boardNearby pairs
- Rio de Janeiro
- San Francisco
- San Francisco – São Paulo
- New York – Rio de Janeiro
- Los Angeles – Rio de Janeiro
- Chicago – Rio de Janeiro
- Mexico City – Rio de Janeiro
- Mexico City – San Francisco
- New York – San Francisco
- Buenos Aires – Rio de Janeiro
- Buenos Aires – San Francisco
- Bogotá – Rio de Janeiro
- City pairs
How this page is calculated
Offsets and daylight-saving rules come from the IANA time zone database through the standard Intl API — the same source the board uses, so nothing here is a hand-written offset table. Working hours are 09:00–18:00 local on both sides unless you change them on the board. City names and coordinates: GeoNames (CC BY 4.0).
Computed on August 28, 2026 · America/Sao_Paulo · America/Los_Angeles · About