What is military time?
Military time is the 24-hour clock format. Instead of using AM and PM, the day runs from 00:00 at midnight to 23:59 just before the next midnight.
24-hour vs 12-hour clock
The 12-hour clock repeats hour numbers from 1 to 12 and adds AM or PM. The 24-hour clock uses unique hour numbers from 00 to 23, so 2:30 PM becomes 14:30 and 11:15 PM becomes 23:15.
Conversion chart
Midnight is 12:00 AM or 00:00. Noon is 12:00 PM or 12:00. Afternoon and evening times add 12 to the hour, so 1:00 PM is 13:00, 6:00 PM is 18:00, and 11:00 PM is 23:00.