How would you correctly say 6:30 AM in military time?

The correct way to express the time 6:30 AM in military time is 0630. In military time, which uses a 24-hour clock, the hours of the day are represented without the use of AM or PM. The first two digits represent the hour (in this case, 06 for 6 AM), and the last two digits represent the minutes (30). Therefore, when combined, it reads as 0630.

Using AM or PM is unnecessary in military time, as the format inherently clarifies whether the time is during the morning or afternoon. This makes options that add "AM" redundant and incorrect. Conversely, 0730 and 0930 would represent 7:30 AM and 9:30 AM respectively, which do not correctly reflect the desired time of 6:30 AM.