Singkatan waktu dalam bahasa inggris

A.D.	= Anno Domini = in the year of our lord= sesudah masehi
B.C.	= Before Christ = sebelum masehi
a.m.	= ante meridiem = before noon =sebelum tengah hari, sebelum jam 12.00
p.m.	= post meridiem = after noon = sesudah tengah hari, sesudah jam 12.00
m	= meredies = noon = siang hari