Montreal to O'Fallon, IL: time difference
O'Fallon, IL is 1 h behind Montreal. 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.
Montreal 20:59 8:59 PM O'Fallon, IL 19:59 7:59 PM You –:–
20:59 8:59 PM
Eastern Daylight Time · UTC-4
☀️ 07:19 · 🌙 18:00
19:59 7:59 PM
Central Daylight Time · UTC-5
☀️ 07:15 · 🌙 18:15
·
−1 h
O'Fallon, IL is 1 h behind Montreal.
When you, Montreal 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
🇨🇦 Montreal
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
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 | 🇨🇦 Montreal | 🇺🇸 O'Fallon, IL |
|---|---|---|
| Local time | 20:59 | 19:59 |
| Local date | Wednesday, October 21, 2026 | Wednesday, October 21, 2026 |
| Time zone | Eastern Daylight Time | Central Daylight Time |
| UTC offset | UTC-4 | UTC-5 |
| Offset from Montreal | — | −1 h |
| IANA zone | America/Toronto | America/Chicago |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | On summer time → UTC-6, Nov 1, 01:00 |
| Sunrise | 07:19 | 07:15 |
| Sunset | 18:00 | 18:15 |
| Daylight | 10 h 41 min | 10 h 59 min |
| People on this clock | 1,762,949 | 94,074 |
Compare Montreal with another city
More comparisons with Montreal: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Montreal and O'Fallon, IL: common questions
How many hours behind Montreal is O'Fallon, IL?
The clocks in O'Fallon are 1 hour behind those in Montreal (UTC−5 and UTC−4).
What time is it in O'Fallon, IL, at the start of the working day in Montreal?
The working day in Montreal starts at 9:00 AM; in O'Fallon it is 8:00 AM at that moment.
What time is it in O'Fallon, IL, when it is 6:00 PM in Montreal?
When it is 6:00 PM in Montreal, it is 5:00 PM in O'Fallon.
Is there a time when both Montreal and O'Fallon, IL, are at work?
Yes: from 10:00 AM to 6:00 PM in Montreal (9:00 AM to 5:00 PM in O'Fallon), the working days (9:00 AM–6:00 PM) overlap.
When is it still the previous day in O'Fallon, IL?
Until 1:00 AM in Montreal it is still the previous day in O'Fallon. The other way round, from 11:00 PM in O'Fallon it is already the next day in Montreal.
Does the time gap between Montreal and O'Fallon, IL, change during the year?
No – both places switch to and from summer time on the same dates, so the gap stays 1 hour.
