Lisbon to Castro Valley, CA: time difference
Castro Valley, CA is 8 h behind Lisbon. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Lisbon 12:39 12:39 PM Castro Valley, CA 04:39 4:39 AM You –:–
12:39 12:39 PM
Western European Summer Time · UTC+1
☀️ 07:53 · 🌙 18:50
04:39 4:39 AM
Pacific Daylight Time · UTC-7
☀️ 07:24 · 🌙 18:23
·
−8 h
Castro Valley, CA is 8 h behind Lisbon.
When you, Lisbon and Castro Valley, CA are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇵🇹 Lisbon
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇺🇸 Castro Valley, CA
16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇵🇹 Lisbon | 🇺🇸 Castro Valley, CA |
|---|---|---|
| Local time | 12:39 | 04:39 |
| Local date | Thursday, October 22, 2026 | Thursday, October 22, 2026 |
| Time zone | Western European Summer Time | Pacific Daylight Time |
| UTC offset | UTC+1 | UTC-7 |
| Offset from Lisbon | — | −8 h |
| IANA zone | Europe/Lisbon | America/Los Angeles |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | On summer time → UTC-8, Nov 1, 01:00 |
| Sunrise | 07:53 | 07:24 |
| Sunset | 18:50 | 18:23 |
| Daylight | 10 h 57 min | 10 h 59 min |
| People on this clock | 545,923 | 61,388 |
Compare Lisbon with another city
More comparisons with Lisbon: the time zones next to it and the far side of the clock.
Big time differences
Lisbon and Castro Valley, CA: common questions
How far behind Lisbon is Castro Valley, CA?
Castro Valley is 8 hours behind Lisbon: UTC−7 against UTC+1.
If it is 9:00 AM in Lisbon, what time is it in Castro Valley, CA?
At 9:00 AM in Lisbon, clocks in Castro Valley show 1:00 AM.
What time is it in Castro Valley, CA, when it is 6:00 PM in Lisbon?
When it is 6:00 PM in Lisbon, it is 10:00 AM in Castro Valley.
Is there a time when both Lisbon and Castro Valley, CA, are at work?
Yes: from 5:00 PM to 6:00 PM in Lisbon (9:00 AM to 10:00 AM in Castro Valley), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Castro Valley, CA, compared with Lisbon?
The new day starts in Castro Valley later: until 8:00 AM in Lisbon, it is still the previous day there. From 4:00 PM in Castro Valley, Lisbon is already on the next day.
Is the time difference between Lisbon and Castro Valley, CA, the same all year?
No. Both places use summer time, but they switch on different dates, so for a while the gap changes. From October 25, 2026, Castro Valley will be 7 hours behind Lisbon.
