How is 1:00 AM expressed in military time?

Military time uses a 24-hour clock format, which eliminates ambiguity between AM and PM. In this system, the hours of the day start at 0000 at midnight. As the day progresses, time is counted consecutively until it reaches 2359 right before the next midnight.

For 1:00 AM, you begin from midnight (0000) and count forward one hour. Therefore, 1:00 AM is expressed as 0100 in military time. The first two digits represent the hour (01) and the last two digits represent the minutes (00), making the military representation of one o'clock in the morning 0100.

This understanding of military time is crucial for operations, coordination, and communication, especially in contexts where clarity is essential to avoid confusion between morning and evening hours. The other options represent different times: 1200 is noon, 0001 is one minute after midnight, and 1300 is one o'clock in the afternoon.