Current local time in O'FallonMissouri, United States
––:––
America/ChicagoUTC−6 / UTC−5
O'Fallon keeps Central Standard Time (CST, UTC−6) in winter and Central Daylight Time (CDT, UTC−5) in summer. Its IANA time zone is America/Chicago.
Daylight saving time in O'Fallon
O'Fallon changes its clocks twice a year. The next changes, from the IANA time zone database as of October 2026:
- Sun, Nov 1, 2026: clocks go back 1 hour to UTC−6
- Sun, Mar 14, 2027: clocks go forward 1 hour to UTC−5
Cities on the same time as O'Fallon
These places show the same clock as O'Fallon every day of the coming year, clock changes included.
- In United States
Chicago, Houston, San Antonio, Dallas, Fort Worth, Austin, Nashville, Oklahoma City
- In other countries
Reynosa (Mexico)
O'Fallon time zone at a glance
- IANA time zone
- America/Chicago
- UTC offset
- UTC−6 / UTC−5
- Daylight saving
- Observed
- Next clock change
- Sun, Nov 1, 2026 → UTC−6
- Country
- United States
- Region
- Missouri
- Coordinates
- 38.81°, -90.70°
- Population
- 85,040
- Local date
- —
Sunrise and sunset in O'Fallon today
Computed from O'Fallon's latitude and longitude for the current local date. Times shift by a minute or two either side depending on elevation and the horizon you actually see.
- Sunrise
- —
- Sunset
- —
- Solar noon
- —
- Day length
- —
- Civil dawn
- —
- Civil dusk
- —
- Golden hour ends
- —
- Golden hour begins
- —
O'Fallon time difference from major cities
| City | Local time now | O'Fallon is |
|---|---|---|
| New York CityUnited States | — | 1h behind |
| LondonUnited Kingdom | — | 6h behind |
| DubaiUnited Arab Emirates | — | 9h behind |
| SingaporeSingapore | — | 13h behind |
| TokyoJapan | — | 14h behind |
| SydneyAustralia | — | 16h behind |
Need a different pair? Compare any two cities or convert a specific time.
O'Fallon time: questions and answers
- What time is it in O'Fallon right now?
- The clock at the top of this page shows the live local time in O'Fallon, updated every second from your device's clock. O'Fallon keeps Central Standard Time (CST, UTC−6) in winter and Central Daylight Time (CDT, UTC−5) in summer.
- What time zone is O'Fallon in?
- O'Fallon is in the IANA time zone America/Chicago: Central Standard Time (CST, UTC−6) in winter and Central Daylight Time (CDT, UTC−5) in summer.
- Does O'Fallon observe daylight saving time?
- Yes. Upcoming changes: Sun, Nov 1, 2026: clocks go back 1 hour to UTC−6; Sun, Mar 14, 2027: clocks go forward 1 hour to UTC−5.
- Which cities share O'Fallon's time?
- Chicago, Houston, San Antonio, Dallas, Fort Worth, Austin keep the same clock as O'Fallon all year.
Planning something with O'Fallon?
- Find a meeting time — the hours that overlap between O'Fallon and your team.
- Convert a time — turn a time in O'Fallon into yours, or the other way round.
- Compare office hours — when O'Fallon offices and yours are both open.
- Send a calendar invite — with the America/Chicago time zone set correctly.
Other cities in United States
Memphis, New South Memphis, Chicago, Indianapolis, Nashville, Louisville, Milwaukee, Oklahoma City, Columbus, Detroit