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).
Herein, how can I remember 12 AM and PM?
If midnight were 12 PM, then the minute before 1 AM would be 12:59 PM, which wouldn't make sense. The words come from Latin, but you can remember PM with an English mnemonic as "post-midday" -- anything after noon is post-midday, including 12:00:01 and 12:59 (one minute before 1 PM).
Beside above, what is the meaning of AM and PM in time?
Full form of AM and PM, AM PM Meaning AM stands in short for Ante Meridiem, de latin name for “Before Midday” or “Before Noon”. An example: 10.00 a.m. is 10 o-clock in the morning. With a 24 hour time this is 10:00. PM stands in short for Post Meridiem, de latin name for “After Midday” or “After Noon”.
What does 00 mean in time?
12:00 can only be mid-day. 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.
Which is 12pm and 12am?
The American Heritage Dictionary of the English Language states "By convention, 12 AM denotes midnight and 12 PM denotes noon. Because of the potential for confusion, it is advisable to use 12 noon and 12 midnight."