0300 hours = 3:00 AM
0300 hours is 3:00 AM in standard 12-hour time. On a 24-hour clock it is 03:00. Spoken military time is “zero three hundred hours”.
How to convert 0300
0300 is a morning time (hour 3 on the 24-hour clock). Drop any leading zero and add AM: 3:00 AM. Hours 0000–1159 are all AM.