What is the last minute of the day expressed in the 24-hour clock?

The last minute of the day in the 24-hour clock is represented as 2359. This is one minute before the end of the day at 2400, which technically denotes the beginning of a new day rather than a time within the current day. In military and aviation contexts, time is typically expressed using a 24-hour clock to avoid confusion between AM and PM.

Therefore, 2359 indicates that it is 11:59 PM, just one minute before midnight. Midnight is then expressed as 0000, marking the start of the new day. Understanding this format is crucial for various applications in aviation, such as flight scheduling and operations, where precise timing is essential for safety and coordination.