This means that 12:00am = 0000hrs, 1:00am = 0100hrs, etc.
As the dividing point between one day and another, midnight defies easy classification as either part of the preceding day or of the following day. Though there is no global unanimity on the issue, most often midnight is considered the start of a new day and is associated with the hour 00:00.
Military Time Chart. Here's the whole list: Midnight (12:00 a.m.) — 0000 hrs. 1:00 a.m. — 0100 hrs.
00:00 = 12:00 AM
00:00 on a 24-hour clock is is 12:00 AM on a 12-hour clock. This system is used throughout the world (not just the military) and leverages a 24-hour time clock rather than the 12-hour AM/PM system known to most English speaking countries.
Alternatively, you could use the 24-hour clock system, where 12:00 is noon and 00:00 (or 24:00) is midnight.
A 24-hour clock typically uses the numbers 0-23, where 00:00 indicates midnight, and a day runs from midnight to midnight over the course of 24 hours.
A day has 24 hours and starts with the first second at 00:00:00. So the 24 hours are finished with the completion of the last second, which starts at 23:59:59. The time 24:00:00 does not exist in the 24-hour system nor in the 12-hour system. The next second is the first second of the next day and therefore 00:00:00.
24:00 is midnight of the next day. 00:00 is midnight of the current day. That's the difference.
Another convention sometimes used is that, since 12 noon is by definition neither ante meridiem (before noon) nor post meridiem (after noon), then 12am refers to midnight at the start of the specified day (00:00) and 12pm to midnight at the end of that day (24:00).
If your day begins at midnight, you use 0000 in military time, pronounced zero hundred hours. If your day ends at midnight, you end your day at 2400, pronounced 24 hundred hours.
If it is the beginning of the day, activity, or event then use 0000 (Pronounced: “Zero Hundred Hours” or “Midnight”). If it is the end of the day, activity or event then use 2400 (Pronounced: “Zero Hundred Hours,” “Twenty Four Hundred Hours,” or “Midnight”).
In the 24-hour time notation, the day begins at midnight, 00:00 or 0:00, and the last minute of the day begins at 23:59. Where convenient, the notation 24:00 may also be used to refer to midnight at the end of a given date — that is, 24:00 of one day is the same time as 00:00 of the following day.
As the day begins at midnight, midnight must be 12am. The moment of noon is in the first second, consequently minute and hour of the afternoon therefore noon must be 12pm.
Midnight is called 24:00 and is used to mean the end of the day and 00:00 is used to mean the beginning of the day. For example, you would say "Tuesday at 24:00" and "Wednesday at 00:00" to mean exactly the same time.
To avoid confusion between 12 a.m. and 12 p.m. , use the 24-hour system, or write out the time in words, depending on the context: For 12 a.m. , use 00:00 (or 24:00), or midnight. For 12 p.m. , use 12:00 or noon.
00:01 = 12:01 AM
00:01 on a 24-hour clock is is 12:01 AM on a 12-hour clock. This system is used throughout the world (not just the military) and leverages a 24-hour time clock rather than the 12-hour AM/PM system known to most English speaking countries.
12:15 AM using 12-hour clock notation, 00:15 using 24-hour clock notation. Military time notation is based on 24-hour clock. A time of day is written in the form hhmm, where hh (0-23) stands for full hours that have passed since midnight, mm (00-59) is the number of minutes that have passed since the last full hour.
12:00 AM is correct. One should not say 0:00 AM. While saying in 24 hours format, one has to say 0:00 hours and in this case, 0:00 hours is more accurate as it is in a 24 hour clock system.
It is common in transport timetables to use 23:59 Sunday or 00:01 Monday (in this example), or 11:59 p.m. or 12:01 a.m., to further reduce confusion. There are no standards established for the meaning of 12 a.m. and 12 p.m. It is often said that 12 a.m. Monday is midnight on Monday morning and 12 p.m. is mid-day.
In 24-hour (military) time, 12:00am is equal to 0000 and is read as “0 hundred hours”. 1:00am, or 0100, is pronounced as “zero 1 hundred hours”.