Montreal to Castro Valley, CA: time difference
Castro Valley, CA is 3 h behind Montreal. 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.
Montreal 09:54 9:54 AM Castro Valley, CA 06:54 6:54 AM You –:–
09:54 9:54 AM
Eastern Daylight Time · UTC-4
☀️ 07:20 · 🌙 17:58
06:54 6:54 AM
Pacific Daylight Time · UTC-7
☀️ 07:24 · 🌙 18:23
·
−3 h
Castro Valley, CA is 3 h behind Montreal.
When you, Montreal 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
🇨🇦 Montreal
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
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 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇨🇦 Montreal | 🇺🇸 Castro Valley, CA |
|---|---|---|
| Local time | 09:54 | 06:54 |
| Local date | Thursday, October 22, 2026 | Thursday, October 22, 2026 |
| Time zone | Eastern Daylight Time | Pacific Daylight Time |
| UTC offset | UTC-4 | UTC-7 |
| Offset from Montreal | — | −3 h |
| IANA zone | America/Toronto | America/Los Angeles |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | On summer time → UTC-8, Nov 1, 01:00 |
| Sunrise | 07:20 | 07:24 |
| Sunset | 17:58 | 18:23 |
| Daylight | 10 h 38 min | 10 h 59 min |
| People on this clock | 1,762,949 | 61,388 |
Compare Montreal with another city
More comparisons with Montreal: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Montreal and Castro Valley, CA: common questions
How many hours behind Montreal is Castro Valley, CA?
The clocks in Castro Valley are 3 hours behind those in Montreal (UTC−7 and UTC−4).
If it is 9:00 AM in Montreal, what time is it in Castro Valley, CA?
At 9:00 AM in Montreal, clocks in Castro Valley show 6:00 AM.
What time is it in Castro Valley, CA, when it is 6:00 PM in Montreal?
When it is 6:00 PM in Montreal, it is 3:00 PM in Castro Valley.
When do working hours in Montreal and in Castro Valley, CA, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 12:00 PM to 6:00 PM in Montreal, which is 9:00 AM to 3:00 PM in Castro Valley.
When does the date change in Castro Valley, CA, compared with Montreal?
The new day starts in Castro Valley later: until 3:00 AM in Montreal, it is still the previous day there. From 9:00 PM in Castro Valley, Montreal is already on the next day.
Is the time difference between Montreal and Castro Valley, CA, the same all year?
Yes. Both places switch to summer time and back on the same dates, so the gap remains 3 hours.
