The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods:a.m. (from the Latin ante meridiem, meaning "before midday") and p.m. (post meridiem, "after midday"). Each period consists of 12 hours numbered: 12 (acting as zero),1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11. The 24 hour/day cycle starts at 12 midnight (often indicated as 12 a.m.), runs through 12 noon (often indicated as 12 p.m.), and continues to the midnight at the end of the day.
The 12-hour clock was developed over time from the mid-second millennium BC to the 16th century AD.
The natural day/night division of a calendar day forms the fundamental basis as to why each day is split into two cycles. Originally these were one cycle which could be tracked by the position of the Sun (day) followed by one cycle which could be tracked by the Moon and stars (night). This would eventually evolve into the two 12-hour periods that started at midnight (a.m.) and noon (p.m.) which are used today. Noon itself is rarely abbreviated today, but if it is, it is denoted M.
Dear John, I'm sorry I can't do this anymore
You're not the man I fell in love with
And I have to move on with my life, goodbye
Goodbye, goodbye, goodbye cool
You were the one who'd never leave
Beautiful eyes, you seemed so free
Touching your face I felt complete
Holding your hand my heart would weep
So everything that came out of your mouth was full of lies
You looked me right dead in the eyes
You'd call your girlfriends and tell them that I abused your trust
You did your best to demonize
You were the one who'd never leave
Beautiful eyes, you seemed so free
Touching your face I felt complete
Holding your hand my heart would weep
You were the one who raped my soul
Beautiful lies, you stole my hope
Touching your ass, I scratch the skin
Holding your neck, I tie the rope
(Pulling it tight)
You were the one who'd never leave
Beautiful eyes, you seemed so free
Touching your face I felt complete
Holding your hand my heart would weep
You were the one, the one for me
Now that you're gone it's hard to see
So much of me has gone away
There's no need to stay another day
But someone's got to pay
But someone's got to pay
But someone's got to pay
But someone's got to pay
But someone's got to pay
But someone's got to pay
But someone's got to pay