Current Time in O'Fallon, United States
Tuesday, November 3, 2026
04:29:18
America/Denver · UTC-7:00 · MST
Time Zone
America/Denver
UTC Offset
UTC-7:00
Abbreviation
MST
DST
Not in effect
O'Fallon is in the America/Denver time zone (UTC-7:00). Compared with Beijing time, O'Fallon is +15h vs Beijing. This page refreshes every second; time zone and DST rules come from the IANA tzdata database.
Sunrise & Sunset in O'Fallon Today
Sunrise
05:32
Sunset
16:00
Day Length
10小时28分
It is currently nighttime in O'Fallon. Computed from city coordinates with the NOAA solar algorithm.