Time difference between San Francisco and Yokohama
17 hours
Yokohama is 17 hours ahead of San Francisco.
Does daylight saving change it?
Yes. In winter the gap is 17 hours; in summer it is 16 hours. Only San Francisco observes daylight saving.
Overlapping work hours
Between 16:00 and 18:00 in San Francisco, Yokohama is also at work — 2 hours a day.
San Francisco time → Yokohama time
| 00:00 | 17:00 |
|---|---|
| 01:00 | 18:00 |
| 02:00 | 19:00 |
| 03:00 | 20:00 |
| 04:00 | 21:00 |
| 05:00 | 22:00 |
| 06:00 | 23:00 |
| 07:00 | 00:00next day |
| 08:00 | 01:00next day |
| 09:00 | 02:00next day |
| 10:00 | 03:00next day |
| 11:00 | 04:00next day |
| 12:00 | 05:00next day |
| 13:00 | 06:00next day |
| 14:00 | 07:00next day |
| 15:00 | 08:00next day |
| 16:00 | 09:00next day |
| 17:00 | 10:00next day |
| 18:00 | 11:00next day |
| 19:00 | 12:00next day |
| 20:00 | 13:00next day |
| 21:00 | 14:00next day |
| 22:00 | 15:00next day |
| 23:00 | 16:00next day |
Standard time (January). During daylight saving each row shifts by an hour.
Frequently asked questions
Q. How many hours is San Francisco ahead of Yokohama?
17 hours on standard time. During daylight saving it becomes 16 hours, an hour more or less.
Q. What time is it in Yokohama when it is noon in San Francisco?
Read the 12:00 row of the 24-hour table below. The table is on standard time, so each row shifts an hour during daylight saving.
Q. When should we schedule a meeting?
The two cities' work hours (09:00–18:00) overlap for 2 hours a day. Anything inside that window catches both sides at work.