Tbilisi to Castle Rock, CO: time difference
Castle Rock, CO is 10 h behind Tbilisi. 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.
Tbilisi 22:59 10:59 PM Castle Rock, CO 12:59 12:59 PM You –:–
22:59 10:59 PM
Georgia Standard Time · UTC+4
☀️ 07:07 · 🌙 18:30
12:59 12:59 PM
Mountain Daylight Time · UTC-6
☀️ 07:05 · 🌙 18:29
·
−10 h
Castle Rock, CO is 10 h behind Tbilisi.
When you, Tbilisi 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
🇬🇪 Tbilisi
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
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 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇪 Tbilisi | 🇺🇸 Castle Rock, CO |
|---|---|---|
| Local time | 22:59 | 12:59 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Georgia Standard Time | Mountain Daylight Time |
| UTC offset | UTC+4 | UTC-6 |
| Offset from Tbilisi | — | −10 h |
| IANA zone | Asia/Tbilisi | America/Denver |
| Daylight saving | Not observed | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 07:07 | 07:05 |
| Sunset | 18:30 | 18:29 |
| Daylight | 11 h 22 min | 11 h 25 min |
| People on this clock | 1,241,700 | 73,158 |
Compare Tbilisi with another city
More comparisons with Tbilisi: the time zones next to it and the far side of the clock.
Big time differences
Tbilisi and Castle Rock, CO: common questions
How far behind Tbilisi is Castle Rock, CO?
Castle Rock is 10 hours behind Tbilisi: UTC−6 against UTC+4.
If it is 9:00 AM in Tbilisi, what time is it in Castle Rock, CO?
At 9:00 AM in Tbilisi, clocks in Castle Rock show 11:00 PM (the previous day).
If it is 6:00 PM in Tbilisi, what time is it in Castle Rock, CO?
At 6:00 PM in Tbilisi, clocks in Castle Rock show 8:00 AM.
When is a good time to call Castle Rock, CO, from Tbilisi?
Working hours (9:00 AM–6:00 PM) in Tbilisi and in Castle Rock do not overlap. At 9:00 AM in Tbilisi it is 11:00 PM (the previous day) in Castle Rock; when the working day starts in Castle Rock, it is 7:00 PM in Tbilisi.
When does the date change in Castle Rock, CO, compared with Tbilisi?
The new day starts in Castle Rock later: until 10:00 AM in Tbilisi, it is still the previous day there. From 2:00 PM in Castle Rock, Tbilisi is already on the next day.
Does the time gap between Tbilisi and Castle Rock, CO, change during the year?
Yes – daylight saving time is used in Castle Rock but not in Tbilisi. From November 1, 2026, Castle Rock will be 11 hours behind Tbilisi.
