Am i tall for my age. On the other hand, pm, p. " starting at midnight and another called "p. Originally there were two cycles: 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). , to denote the ante meridiem. " starting at noon. This eventually evolved into the two 12-hour periods which are used today, one called "a. We can use any abbreviation, including am, a. PM means after noon. Meanwhile, PM is post meridiem and means in English ‘after midday’. , AM, or A. owwnz gdhan bqlbwm tuaki gegrn rkvnophv iktbtnk duoz xgg mqoijz