The time of day when, on average over the year, the Sun reaches its highest elevation in the sky. Noon is 12:00 in universal time. Noon itself is neither a.m. nor p.m., but the minute between 12:00 and 12:01 is p.m., so 12:00 noon is often denoted p.m. on digital clocks in the U. S.

Ante Meridiem, Midnight, Post Meridiem