The first is that British English - using the 12-hour (12-hour clock), using the numbers 1 to 12, followed by am and PM
am = ante Meridiem = after midnight and before noon
(twelve one a.m. am - 11:59 am)
PM. = post meridiem = after noon to midnight
(12.00 pm - 11.59 pm).
การแปล กรุณารอสักครู่..