The document compares a 12-hour clock system and a 24-hour clock system. It shows the 12-hour clock labeling hours 1-12 twice per day with a.m. and p.m. designations, while the 24-hour clock runs from 0-23 hours without the need for a.m. or p.m. It then displays the time on both clocks at 5:05 p.m., 5:10 p.m., and 6:15 a.m. to demonstrate how each system represents the same points in time.