Use 00:00 to signify midnight in 24-hour time. That means all you need to do is record the minutes. For example, 12:30 AM becomes 00:30.
But if there is still confusion, why not use the 24 hour clock and then there is no confusion what so ever because everyone should know that 00:00 is midnight and 12:00 is midday, thus 00:30 is 30 minutes past midnight and 12:30 is 30 minutes past mid-day or half twelve (as the English would say) or half past twelve in ...
But 0:00 is midnight. And 12:00 is noon–or midnight. Okay, 0:01AM means something.
"It's half past midnight." You can say It´s half past twelve a.m. or in the morning or It´s 00:30 (only, because it's supposed that we want to say a.m.) It's half an hour past midnight / it's half an hour to 1 am / it's 1.30 am .
Converting from a 24 Hour to a 12 Hour Clock
0:30 = 12:30 AM.
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.
Well, 12:30 at night is 12:30 am or 00:30.
Converting Times from 12-hour clock to 24-Hour clock
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”. The rest of the hours between 12:00 AM and noon on the 12-hour clock are equal to the hours between 0000hrs and 1200hrs.
0000 – Midnight and the start of the day is called "Zero hundred hours." 0100 – One a.m. is "Zero one hundred hours." 0630 – 6:30 a.m. is "Zero six-thirty," or (better) "Zero six-three-zero." 1045 – 10:45 a.m. is read or spoken as "Ten hundred forty-five" or "Ten hundred four-five."
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.
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. Even in locales with this technical resolution, however, vernacular references to midnight as the end of any given day may be common.
How to Say 0030 (12:30 AM) in Military Time. You can say as: “Zero Zero Thirty hours.”
Morning technically starts after midnight. However, 3 a.m. is too early to be considered part of the daytime. For most of the world, it is still dark outside at this time and most people are sleeping. So, 3 a.m. is considered night.
'Noon' means 'midday' or 12 o'clock during the day. 'Midnight' refers to 12 o'clock during the night.
At the beginning of each hour, we use the term “o'clock”. For example, “It's one o'clock” (1:00). Or “It's four o'clock” (4:00).
Times in the first hour of the day are sometimes given as, for example, 00:47 am, with 00:00 am corresponding to midnight, but with a time twelve hours later given as 12:47 pm.
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.
Half past three (3.30) – or three thirty.
Military Time 0032 is: 12:32 AM using 12-hour clock notation, 00:32 using 24-hour clock notation.
12.30 pm just after noon. 12.30 am is just after midnight. This makes sense, because the first is very early 'afternoon' while the second is very early morning. While we do tend to refer to midday as 12pm and midnight as 12am, strictly speaking this is illogical.