Austin, TX to Boulder, CO: time difference
Boulder, CO is 1 h behind Austin, TX. 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.
Austin, TX 10:13 10:13 AM Boulder, CO 09:13 9:13 AM You –:–
10:13 10:13 AM
Central Daylight Time · UTC-5
☀️ 07:37 · 🌙 18:56
09:13 9:13 AM
Mountain Daylight Time · UTC-6
☀️ 07:19 · 🌙 18:17
·
−1 h
Boulder, CO is 1 h behind Austin, TX.
When you, Austin, TX and Boulder, CO are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 Austin, TX
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
🇺🇸 Boulder, CO
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
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Time zones side by side
| Detail | 🇺🇸 Austin, TX | 🇺🇸 Boulder, CO |
|---|---|---|
| Local time | 10:13 | 09:13 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Central Daylight Time | Mountain Daylight Time |
| UTC offset | UTC-5 | UTC-6 |
| Offset from Austin, TX | — | −1 h |
| IANA zone | America/Chicago | America/Denver |
| Daylight saving | On summer time → UTC-6, Nov 1, 01:00 | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 07:37 | 07:19 |
| Sunset | 18:56 | 18:17 |
| Daylight | 11 h 19 min | 10 h 58 min |
| People on this clock | 974,447 | 106,803 |
Compare Austin, TX with another city
More comparisons with Austin, TX: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Austin, TX and Boulder, CO: common questions
What is the time difference between Austin, TX, and Boulder, CO?
Boulder is 1 hour behind: it uses UTC−6, while Austin is on UTC−5.
If it is 9:00 AM in Austin, TX, what time is it in Boulder, CO?
At 9:00 AM in Austin, clocks in Boulder show 8:00 AM.
What time is it in Boulder, CO, at the end of the working day in Austin, TX?
The working day in Austin ends at 6:00 PM; in Boulder it is 5:00 PM at that moment.
When is a good time to call Boulder, CO, from Austin, TX?
Between 10:00 AM and 6:00 PM in Austin – that is 9:00 AM to 5:00 PM in Boulder – both places are within working hours (9:00 AM–6:00 PM).
Until what time in Austin, TX, is it still yesterday in Boulder, CO?
Before 1:00 AM in Austin, the date in Boulder has not changed yet. From 11:00 PM in Boulder, it is already the next day in Austin.
Does the time difference between Austin, TX, and Boulder, CO, change?
No. The clocks in Austin and in Boulder change on the same dates, so the difference stays 1 hour.
