Offset
The time difference between Greenwich Mean Time and San Francisco is 8 hours.
Greenwich Mean Time (BST) is ahead of San Francisco (PDT).
BST: UTC+1
PDT: UTC-7
Both zones are currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Greenwich Mean Time and San Francisco don't overlap on the same weekday. San Francisco is 8 hours behind Greenwich Mean Time.
With some flexibility, there’s a workable window outside standard hours:
- 3 PM–8 PM in Greenwich Mean Time (7 AM–12 PM in San Francisco) — suggest 5:00 PM Greenwich Mean Time (9:00 AM San Francisco).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
San Francisco uses Pacific Time (PST, or PDT). To call United States, dial +1.
San Francisco is approximately 5,350 miles northwest of Greenwich Mean Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| GMT | San Francisco | Day |
|---|---|---|
| 12:00 am | 4:00 pm | -1 day |
| 1:00 am | 5:00 pm | -1 day |
| 2:00 am | 6:00 pm | -1 day |
| 3:00 am | 7:00 pm | -1 day |
| 4:00 am | 8:00 pm | -1 day |
| 5:00 am | 9:00 pm | -1 day |
| 6:00 am | 10:00 pm | -1 day |
| 7:00 am | 11:00 pm | -1 day |
| 8:00 am | 12:00 am | Same day |
| 9:00 am | 1:00 am | Same day |
| 10:00 am | 2:00 am | Same day |
| 11:00 am | 3:00 am | Same day |
| 12:00 pm | 4:00 am | Same day |
| 1:00 pm | 5:00 am | Same day |
| 2:00 pm | 6:00 am | Same day |
| 3:00 pm | 7:00 am | Same day |
| 4:00 pm | 8:00 am | Same day |
| 5:00 pm | 9:00 am | Same day |
| 6:00 pm | 10:00 am | Same day |
| 7:00 pm | 11:00 am | Same day |
| 8:00 pm | 12:00 pm | Same day |
| 9:00 pm | 1:00 pm | Same day |
| 10:00 pm | 2:00 pm | Same day |
| 11:00 pm | 3:00 pm | Same day |
Daylight saving time
Both zones observe daylight saving time, but they transition on different dates.
Greenwich Mean Time: next transition on Sunday, October 25, 2026.
San Francisco: next transition on Sunday, November 1, 2026.
For approximately 7 days between transitions, the offset between Greenwich Mean Time and San Francisco differs from its typical value. Recurring meetings during this window will shift by one hour.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 4:45 AM
- Sunset
- 9:17 PM
- Day length
- 16h 32m
- Sunrise
- 5:48 AM
- Sunset
- 8:32 PM
- Day length
- 14h 44m
Daylight overlap: 7h 29m — 1:48 PM–9:17 PM in Greenwich Mean Time (5:48 AM–1:17 PM in San Francisco). Both locations are in daylight during this window.
Cities in these zones
Cities in Greenwich Mean Time
Other cities in Pacific Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Airports in Pacific Time
- BUR
- HHR
- LAX
- LGB
- SNA
- CLD
- SAN
- TIJ
- OAK
- SFO
Related conversions
Common conversions
- What is 9:00 am GMT in San Francisco?
- 9:00 am GMT is 1:00 am San Francisco.
- What is 12:00 pm GMT in San Francisco?
- 12:00 pm GMT is 4:00 am San Francisco.
- What is 12:30 pm GMT in San Francisco?
- 12:30 pm GMT is 4:30 am San Francisco.
- What is 2:00 pm GMT in San Francisco?
- 2:00 pm GMT is 6:00 am San Francisco.
- What is 5:00 pm GMT in San Francisco?
- 5:00 pm GMT is 9:00 am San Francisco.
- What is 11:30 pm GMT in San Francisco?
- 11:30 pm GMT is 3:30 pm San Francisco.