Tbilisi to O'Fallon, IL: time difference
O'Fallon, IL is 9 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 04:05 4:05 AM O'Fallon, IL 19:05 7:05 PM You –:–
04:05 4:05 AM
Georgia Standard Time · UTC+4
☀️ 07:21 · 🌙 18:11
19:05 7:05 PM
Central Daylight Time · UTC-5
☀️ 07:15 · 🌙 18:15
·
−9 h
O'Fallon, IL is 9 h behind Tbilisi.
When you, Tbilisi and O'Fallon, IL 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
🇺🇸 O'Fallon, IL
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 14 2 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇪 Tbilisi | 🇺🇸 O'Fallon, IL |
|---|---|---|
| Local time | 04:05 | 19:05 |
| Local date | Thursday, October 22, 2026 | Wednesday, October 21, 2026 |
| Time zone | Georgia Standard Time | Central Daylight Time |
| UTC offset | UTC+4 | UTC-5 |
| Offset from Tbilisi | — | −9 h |
| IANA zone | Asia/Tbilisi | America/Chicago |
| Daylight saving | Not observed | On summer time → UTC-6, Nov 1, 01:00 |
| Sunrise | 07:21 | 07:15 |
| Sunset | 18:11 | 18:15 |
| Daylight | 10 h 50 min | 10 h 59 min |
| People on this clock | 1,241,700 | 94,074 |
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 O'Fallon, IL: common questions
How many hours behind Tbilisi is O'Fallon, IL?
The clocks in O'Fallon are 9 hours behind those in Tbilisi (UTC−5 and UTC+4).
What time is it in O'Fallon, IL, at the start of the working day in Tbilisi?
The working day in Tbilisi starts at 9:00 AM; in O'Fallon it is 12:00 AM at that moment.
What time is it in O'Fallon, IL, at the end of the working day in Tbilisi?
The working day in Tbilisi ends at 6:00 PM; in O'Fallon it is 9:00 AM at that moment.
When do working hours in Tbilisi and in O'Fallon, IL, overlap?
They don't: there are no shared working hours. The start of the day in Tbilisi (9:00 AM) is 12:00 AM in O'Fallon, and the start of the day in O'Fallon is 6:00 PM in Tbilisi.
When does the date change in O'Fallon, IL, compared with Tbilisi?
The new day starts in O'Fallon later: until 9:00 AM in Tbilisi, it is still the previous day there. From 3:00 PM in O'Fallon, Tbilisi is already on the next day.
Is the time difference between Tbilisi and O'Fallon, IL, the same all year?
No. Only O'Fallon switches to summer time, so the gap changes twice a year. From November 1, 2026, O'Fallon will be 10 hours behind Tbilisi.
