Austin, TX to Castle Rock, CO: time difference
Castle Rock, 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 13:59 1:59 PM Castle Rock, CO 12:59 12:59 PM You –:–
13:59 1:59 PM
Central Daylight Time · UTC-5
☀️ 07:30 · 🌙 19:07
12:59 12:59 PM
Mountain Daylight Time · UTC-6
☀️ 07:05 · 🌙 18:29
·
−1 h
Castle Rock, CO is 1 h behind Austin, TX.
When you, Austin, TX and Castle Rock, 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
🇺🇸 Castle Rock, 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
- Both working
- Right now
Time zones side by side
| Detail | 🇺🇸 Austin, TX | 🇺🇸 Castle Rock, CO |
|---|---|---|
| Local time | 13:59 | 12:59 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 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 | 07:30 | 07:05 |
| Sunset | 19:07 | 18:29 |
| Daylight | 11 h 36 min | 11 h 25 min |
| People on this clock | 974,447 | 73,158 |
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 Castle Rock, CO: common questions
How far behind Austin, TX, is Castle Rock, CO?
Castle Rock is 1 hour behind Austin: UTC−6 against UTC−5.
What time is it in Castle Rock, CO, when it is 9:00 AM in Austin, TX?
When it is 9:00 AM in Austin, it is 8:00 AM in Castle Rock.
If it is 6:00 PM in Austin, TX, what time is it in Castle Rock, CO?
At 6:00 PM in Austin, clocks in Castle Rock show 5:00 PM.
When is a good time to call Castle Rock, CO, from Austin, TX?
Between 10:00 AM and 6:00 PM in Austin – that is 9:00 AM to 5:00 PM in Castle Rock – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Castle Rock, CO, compared with Austin, TX?
The new day starts in Castle Rock later: until 1:00 AM in Austin, it is still the previous day there. From 11:00 PM in Castle Rock, Austin is already on the next day.
Does the time difference between Austin, TX, and Castle Rock, CO, change?
No. The clocks in Austin and in Castle Rock change on the same dates, so the difference stays 1 hour.
