Current Time in O'Fallon, United States
Saturday, October 31, 2026
02:23:55
America/Denver · UTC-6:00 · MST
Time Zone
America/Denver
UTC Offset
UTC-6:00
Abbreviation
MST
DST
Active now
O'Fallon is in the America/Denver time zone (UTC-6:00). Compared with Beijing time, O'Fallon is +14h 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
06:29
Sunset
17:03
Day Length
10小时34分
It is currently nighttime in O'Fallon. Computed from city coordinates with the NOAA solar algorithm.