San Jose to Ontario, CA: time difference
Ontario, CA is 1 h behind San Jose. 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.
San Jose 15:09 3:09 PM Ontario, CA 14:09 2:09 PM You –:–
15:09 3:09 PM
Central Standard Time · UTC-6
☀️ 05:25 · 🌙 17:19
14:09 2:09 PM
Pacific Daylight Time · UTC-7
☀️ 06:58 · 🌙 18:15
·
−1 h
Ontario, CA is 1 h behind San Jose.
When you, San Jose and Ontario, 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
🇨🇷 San Jose
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
🇺🇸 Ontario, CA
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 21 9 PM 22 10 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇨🇷 San Jose | 🇺🇸 Ontario, CA |
|---|---|---|
| Local time | 15:09 | 14:09 |
| Local date | Saturday, October 17, 2026 | Saturday, October 17, 2026 |
| Time zone | Central Standard Time | Pacific Daylight Time |
| UTC offset | UTC-6 | UTC-7 |
| Offset from San Jose | — | −1 h |
| IANA zone | America/Costa Rica | America/Los Angeles |
| Daylight saving | Not observed | On summer time → UTC-8, Nov 1, 01:00 |
| Sunrise | 05:25 | 06:58 |
| Sunset | 17:19 | 18:15 |
| Daylight | 11 h 54 min | 11 h 17 min |
| People on this clock | 342,188 | 185,000 |
Compare San Jose with another city
More comparisons with San Jose: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
San Jose and Ontario, CA: common questions
What is the time difference between San Jose and Ontario, CA?
Ontario is 1 hour behind: it uses UTC−7, while San Jose is on UTC−6.
What time is it in Ontario, CA, when it is 9:00 AM in San Jose?
When it is 9:00 AM in San Jose, it is 8:00 AM in Ontario.
What time is it in Ontario, CA, when it is 6:00 PM in San Jose?
When it is 6:00 PM in San Jose, it is 5:00 PM in Ontario.
When is a good time to call Ontario, CA, from San Jose?
Between 10:00 AM and 6:00 PM in San Jose – that is 9:00 AM to 5:00 PM in Ontario – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in Ontario, CA?
Until 1:00 AM in San Jose it is still the previous day in Ontario. The other way round, from 11:00 PM in Ontario it is already the next day in San Jose.
Does the time gap between San Jose and Ontario, CA, change during the year?
Yes – daylight saving time is used in Ontario but not in San Jose. From November 1, 2026, Ontario will be 2 hours behind San Jose.
