Where I’m from, 12:00 a.m. (00:00) is the middle of the night (we call it midnight here), and morning begins when the sun rises (and we say “good morning” during our mornings).
Put more specifically, A.M. and P.M. are abbreviations for “ante meridiem” and “post meridiem”, which are Latin for “before mid-day” and “after mid-day” respectively. Since a new day begins at midnight, it follows that midnight is 12:00 A.M. since it’s the 12 o’clock that is before mid-day.
Where I’m from, 12:00 a.m. (00:00) is the middle of the night (we call it midnight here), and morning begins when the sun rises (and we say “good morning” during our mornings).
Put more specifically, A.M. and P.M. are abbreviations for “ante meridiem” and “post meridiem”, which are Latin for “before mid-day” and “after mid-day” respectively. Since a new day begins at midnight, it follows that midnight is 12:00 A.M. since it’s the 12 o’clock that is before mid-day.