Boulder, CO to San Jose: time difference
San Jose is 1 h ahead of Boulder, CO. 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.
Boulder, CO 01:03 1:03 AM San Jose 02:03 2:03 AM You –:–
01:03 1:03 AM
Mountain Standard Time · UTC-7
☀️ 06:38 · 🌙 16:56
02:03 2:03 AM
Central Standard Time · UTC-6
☀️ 05:29 · 🌙 17:13
·
+1 h
San Jose is 1 h ahead of Boulder, CO.
When you, Boulder, CO and San Jose are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 Boulder, CO
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
🇨🇷 San Jose
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 0 12 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇺🇸 Boulder, CO | 🇨🇷 San Jose |
|---|---|---|
| Local time | 01:03 | 02:03 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Mountain Standard Time | Central Standard Time |
| UTC offset | UTC-7 | UTC-6 |
| Offset from Boulder, CO | — | +1 h |
| IANA zone | America/Denver | America/Costa Rica |
| Daylight saving | On standard time → UTC-6, Mar 14, 03:00 | Not observed |
| Sunrise | 06:38 | 05:29 |
| Sunset | 16:56 | 17:13 |
| Daylight | 10 h 18 min | 11 h 44 min |
| People on this clock | 106,803 | 342,188 |
Compare Boulder, CO with another city
More comparisons with Boulder, CO: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Boulder, CO and San Jose: common questions
What is the time difference between Boulder, CO, and San Jose?
San Jose is 1 hour ahead: it uses UTC−6, while Boulder is on UTC−7.
If it is 9:00 AM in Boulder, CO, what time is it in San Jose?
At 9:00 AM in Boulder, clocks in San Jose show 10:00 AM.
If it is 6:00 PM in Boulder, CO, what time is it in San Jose?
At 6:00 PM in Boulder, clocks in San Jose show 7:00 PM.
When is a good time to call San Jose from Boulder, CO?
Between 9:00 AM and 5:00 PM in Boulder – that is 10:00 AM to 6:00 PM in San Jose – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in San Jose compared with Boulder, CO?
The new day starts in San Jose earlier: at 11:00 PM in Boulder it is already midnight there. Until 1:00 AM in San Jose, Boulder is still on the previous day.
Does the time gap between Boulder, CO, and San Jose change during the year?
Yes – daylight saving time is used in Boulder but not in San Jose. From March 14, 2027, San Jose and Boulder will have the same time.
