California to AEST time conversion
AEST is 17 hours ahead of California. After the next clock change (): AEST is 18 hours ahead of California.
AEST is always UTC+10. Right now most places that use AEST are on AEDT (UTC+11): AEDT is 18 hours ahead of California.
Time difference with your location
California is 7 hours behind UTC. Compare with your local time →
Choose a date and time
Choose the local time in California to convert it to AEST on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · California → AEST
This table converts each hour in California to AEST on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| California | AEST | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 17:005:00 PM | |
| 01:001:00 AM | 18:006:00 PM | |
| 02:002:00 AM | 19:007:00 PM | |
| 03:003:00 AM | 20:008:00 PM | |
| 04:004:00 AM | 21:009:00 PM | |
| 05:005:00 AM | 22:0010:00 PM | |
| 06:006:00 AM | 23:0011:00 PM | |
| 07:007:00 AM | 00:0012:00 AM +1 day | |
| 08:008:00 AM | 01:001:00 AM +1 day | |
| 09:009:00 AM | 02:002:00 AM +1 day | |
| 10:0010:00 AM | 03:003:00 AM +1 day | |
| 11:0011:00 AM | 04:004:00 AM +1 day | |
| 12:0012:00 PM | 05:005:00 AM +1 day | |
| 13:001:00 PM | 06:006:00 AM +1 day | |
| 14:002:00 PM | 07:007:00 AM +1 day | |
| 15:003:00 PM | 08:008:00 AM +1 day | ✓ |
| 16:004:00 PM | 09:009:00 AM +1 day | ✓ |
| 17:005:00 PM | 10:0010:00 AM +1 day | ✓ |
| 18:006:00 PM | 11:0011:00 AM +1 day | |
| 19:007:00 PM | 12:0012:00 PM +1 day | |
| 20:008:00 PM | 13:001:00 PM +1 day | |
| 21:009:00 PM | 14:002:00 PM +1 day | |
| 22:0010:00 PM | 15:003:00 PM +1 day | |
| 23:0011:00 PM | 16:004:00 PM +1 day |
Quick conversion examples
These examples use California (UTC-7) and AEST (UTC+10); choosing a date applies the local clock changes.
Conversion formula: AEST = California + 17h · AEDT = California + 19h · AEDT = California + 18h.
| California | AEST |
|---|---|
| 6:00 AM California | = 11:00 PM AEST |
| 7:00 AM California | = 12:00 AM AEST (+1 day) |
| 8:00 AM California | = 1:00 AM AEST (+1 day) |
| 9:00 AM California | = 2:00 AM AEST (+1 day) |
| 10:00 AM California | = 3:00 AM AEST (+1 day) |
| 12:00 PM California | = 5:00 AM AEST (+1 day) |
| 3:00 PM California | = 8:00 AM AEST (+1 day) |
| 5:00 PM California | = 10:00 AM AEST (+1 day) |
| 6:00 PM California | = 11:00 AM AEST (+1 day) |
| 8:00 PM California | = 1:00 PM AEST (+1 day) |
Overlapping meeting hours
The 08:00–18:00 working day in California and AEST overlaps for 3 hours on 2026-10-21.
- Shared working hours
- 15:00–18:00 California · 08:00–11:00 AEST
Clock changes on both sides, 2026–2028
California and AEST have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | California | AEST |
|---|---|---|
| 2026 | · 02:00 → 03:00 · 02:00 → 01:00 | · 03:00 → 02:00 · 02:00 → 03:00 |
| 2027 | · 02:00 → 03:00 · 02:00 → 01:00 | · 03:00 → 02:00 · 02:00 → 03:00 |
| 2028 | · 02:00 → 03:00 · 02:00 → 01:00 | · 03:00 → 02:00 · 02:00 → 03:00 |
At the start of 2026, AEDT is 19 hours ahead of California. The difference changes during the following periods.
- From 2026-03-08 03:00 California until 2026-04-04 09:00 California, AEDT is 18 hours ahead of California.
- From 2026-04-04 09:00 California until 2026-10-03 09:00 California, AEST is 17 hours ahead of California.
- From 2026-10-03 09:00 California until 2026-11-01 01:00 California, AEDT is 18 hours ahead of California.
- From 2027-03-14 03:00 California until 2027-04-03 09:00 California, AEDT is 18 hours ahead of California.
- From 2027-04-03 09:00 California until 2027-10-02 09:00 California, AEST is 17 hours ahead of California.
- From 2027-10-02 09:00 California until 2027-11-07 01:00 California, AEDT is 18 hours ahead of California.
- From 2028-03-12 03:00 California until 2028-04-01 09:00 California, AEDT is 18 hours ahead of California.
- From 2028-04-01 09:00 California until 2028-09-30 09:00 California, AEST is 17 hours ahead of California.
- From 2028-09-30 09:00 California until 2028-11-05 01:00 California, AEDT is 18 hours ahead of California.
Frequently asked questions
What time is 9 AM California in AEST?
9:00 AM California = 2:00 AM AEST (+1 day), using UTC-7 and UTC+10. Choose a date above for the seasonal local time.
Does the time difference between California and AEST change during the year?
Yes. During 2026–2028: AEST is 17 hours ahead of California; AEST is 18 hours ahead of California; AEST is 19 hours ahead of California. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in AEST?
Read the AEST 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 California and AEST?
The shared 08:00–18:00 working window is 15:00–18:00 California / 08:00–11:00 AEST, a total of 3 hours.
What is the time difference between California and AEST now?
Right now, AEST is 17 hours ahead of California. Conversion formula: AEST = California + 17h · AEDT = California + 19h · AEDT = California + 18h.