United States
Time now in O'Fallon
Sunday, 23 August 2026
Sunrise 06:23Sunset 07:47Time zone UTC −5
Time zone
America/Chicago
UTC offset
UTC −5
Daylight saving
In effect now
Population
79,329
Sunrise
06:23
Sunset
07:47
Day length
13h 24m
Coordinates
38.79, -90.72
Time difference from O'Fallon
Hours ahead (right) or behind (left) O'Fallon right now.
O'Fallon on the map
About the time in O'Fallon
If you are coordinating from another country, the shortcut is the working window: a normal O'Fallon day of 09:00–17:00 falls between 14:00–22:00 UTC. Convert your own hours into UTC once and you can tell at a glance whether someone there is likely to be at their desk.
O'Fallon runs on America/Chicago, which puts the city UTC −5 from Coordinated Universal Time right now. The clock at the top of this page is not copied from your device: it is anchored to our reference timestamp and re-rendered every second against the IANA time zone database, so it stays right even when a laptop or phone has quietly drifted.
O'Fallon is on daylight saving time at the moment, which is why the offset reads UTC −5 instead of its winter value. Clocks go back on 1 November 2026, and anything scheduled across that date shifts by an hour.
Frequently asked questions about time in O'Fallon
- Does O'Fallon change its clocks for daylight saving?
- Yes, and it is in effect now. Clocks change again on 1 November 2026.
- What are normal business hours in O'Fallon in UTC?
- A 09:00–17:00 working day in O'Fallon runs from 14:00–22:00 UTC today.
- When do the sun rise and set in O'Fallon today?
- Sunrise is at 06:23 and sunset at 07:47, giving 13h 24m of daylight.
- What time is it in O'Fallon right now?
- The live clock above shows the current time in O'Fallon, updating every second from America/Chicago (UTC −5).
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