A.M. jẹ abbreviation fun "ante meridiem," eyi ti o jẹ a Latin oro ti o tumo si "ṣaaju ki o to ọsan." A lo lati tọka si akoko laarin 12:00 ọganjọ ati 11:59 owurọ, ti o jẹ aṣoju ni deede lori aago wakati 12 bi 12:00 owurọ tabi “a.m.”
