12 o'clock

12 O'clock usually refers to a clock position on the 12-hour clock, either noon - 12 o'clock in the daytime - or midnight - 12 o'clock in the nighttime.
It may also refer to:

A Wu-Tang Clan affiliate, 12 O'Clock
A community in Quinte West
12 O'Clock (1958 film) a Bollywood film starring Guru Dutt and Waheeda Rehman

See also

Twelve O'Clock High
Twelve O'clock Knob (Roanoke County, Virginia)
...