What time is 0823 in military time?

0823 (or 08:23) is 8:23 AM.

The other way round: 8:23 AM in military time is 0823, said “zero eight twenty-three hours.”

Military time	0823 hours
24-hour clock	08:23
12-hour clock	8:23 AM
Said out loud	“zero eight twenty-three hours”
Minutes after midnight	503
Share of the day gone	34.9%

How to convert 0823

The hour is 08, which is before 12, so it's a morning time: drop the leading zero, keep the minutes (23) and add AM. That gives 8:23 AM.