Post Meridiem, commonly abbreviated as PM, refers to the time period from noon until midnight. It is derived from Latin, meaning "after midday." This segment of the day typically begins at 12:00 PM and ends at 11:59 PM. During the afternoon, people often engage in various activities such as work, school, or leisure. The sun is usually at its highest point around noon, gradually descending as the afternoon progresses. This time is often associated with a decrease in energy levels, leading many to take breaks or enjoy snacks.