There are 24-hours in a day that is divided into two equal 12-hour periods, marked with "a.m." (before midday) and "p.m." (after midday).
Early Morning: 5:00 AM – 8:00 AM
Morning: 8:00 AM – 12:00 PM
Afternoon: 12:00 PM – 5:00 PM
Evening: 5:00 PM – 9:00 PM
Night: 9:00 PM – 12:00 AM
Late Night: 12:00 AM – 5:00 AM