What is the origin of the terms "a. m." and "p. m." in our timekeeping?

Answer and Explanation:

The a. m and p. m are Latin words a. m means ante meridian meridian means mid day and ante means before so a. m means before mid day p. m is also an Latin word in which p stands for post and meridian stands for the mid day so p. m means post mid day. The origin of a. m and p. m is Latin word for example 6 a. m means 6 'o' clock in morning and 6 p, m means 6 'o' clock in evening