GMT to California time conversion
California is 7 hours behind GMT. After the next clock change (): California is 8 hours behind GMT.
Time difference with your location
GMT has the same time as UTC. Compare with your local time →
Choose a date and time
Choose the local time in GMT to convert it to California on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · GMT → California
This table converts each hour in GMT to California on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| GMT | California | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 17:005:00 PM -1 day | |
| 01:001:00 AM | 18:006:00 PM -1 day | |
| 02:002:00 AM | 19:007:00 PM -1 day | |
| 03:003:00 AM | 20:008:00 PM -1 day | |
| 04:004:00 AM | 21:009:00 PM -1 day | |
| 05:005:00 AM | 22:0010:00 PM -1 day | |
| 06:006:00 AM | 23:0011:00 PM -1 day | |
| 07:007:00 AM | 00:0012:00 AM | |
| 08:008:00 AM | 01:001:00 AM | |
| 09:009:00 AM | 02:002:00 AM | |
| 10:0010:00 AM | 03:003:00 AM | |
| 11:0011:00 AM | 04:004:00 AM | |
| 12:0012:00 PM | 05:005:00 AM | |
| 13:001:00 PM | 06:006:00 AM | |
| 14:002:00 PM | 07:007:00 AM | |
| 15:003:00 PM | 08:008:00 AM | ✓ |
| 16:004:00 PM | 09:009:00 AM | ✓ |
| 17:005:00 PM | 10:0010:00 AM | ✓ |
| 18:006:00 PM | 11:0011:00 AM | |
| 19:007:00 PM | 12:0012:00 PM | |
| 20:008:00 PM | 13:001:00 PM | |
| 21:009:00 PM | 14:002:00 PM | |
| 22:0010:00 PM | 15:003:00 PM | |
| 23:0011:00 PM | 16:004:00 PM |
Quick conversion examples
These examples use GMT (UTC+0) and California (UTC-7); choosing a date applies the local clock changes.
Conversion formula: California = GMT − 7h · UTC − 8h · UTC − 7h.
| GMT | California |
|---|---|
| 6:00 AM GMT | = 11:00 PM California (-1 day) |
| 7:00 AM GMT | = 12:00 AM California |
| 8:00 AM GMT | = 1:00 AM California |
| 9:00 AM GMT | = 2:00 AM California |
| 10:00 AM GMT | = 3:00 AM California |
| 12:00 PM GMT | = 5:00 AM California |
| 3:00 PM GMT | = 8:00 AM California |
| 5:00 PM GMT | = 10:00 AM California |
| 6:00 PM GMT | = 11:00 AM California |
| 8:00 PM GMT | = 1:00 PM California |
Overlapping meeting hours
The 08:00–18:00 working day in GMT and California overlaps for 3 hours on 2026-10-21.
- Shared working hours
- 15:00–18:00 GMT · 08:00–11:00 California
Clock changes on both sides, 2026–2028
GMT and California have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | GMT | California |
|---|---|---|
| 2026 | No clock changes; UTC+0 all year. | · 02:00 → 03:00 · 02:00 → 01:00 |
| 2027 | No clock changes; UTC+0 all year. | · 02:00 → 03:00 · 02:00 → 01:00 |
| 2028 | No clock changes; UTC+0 all year. | · 02:00 → 03:00 · 02:00 → 01:00 |
At the start of 2026, California is 8 hours behind UTC. The difference changes during the following periods.
- From 2026-03-08 10:00 UTC until 2026-11-01 09:00 UTC, California is 7 hours behind UTC.
- From 2027-03-14 10:00 UTC until 2027-11-07 09:00 UTC, California is 7 hours behind UTC.
- From 2028-03-12 10:00 UTC until 2028-11-05 09:00 UTC, California is 7 hours behind UTC.
Frequently asked questions
What time is 9 AM GMT in California?
9:00 AM GMT = 2:00 AM California, using UTC+0 and UTC-7. Choose a date above for the seasonal local time.
Does the time difference between GMT and California change during the year?
Yes. During 2026–2028: California is 8 hours behind GMT; California is 7 hours behind GMT. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in California?
Read the California clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between GMT and California?
The shared 08:00–18:00 working window is 15:00–18:00 UTC / 08:00–11:00 California, a total of 3 hours.
What is the time difference between GMT and California now?
Right now, California is 7 hours behind UTC. Conversion formula: California = GMT − 7h · UTC − 8h · UTC − 7h.