Tanım: AM (*ante meridiem*) = 00:00–11:59; PM (*post meridiem*) = 12:00–23:59. 12:00 AM = 00:00, 12:00 PM = 12:00 (öğle).
Kaynak: NIST – AM and PM — https://www.nist.gov/pml/time-and-frequency-division/time-telling/am-and-pm
Tanım: AM (*ante meridiem*) = 00:00–11:59; PM (*post meridiem*) = 12:00–23:59. 12:00 AM = 00:00, 12:00 PM = 12:00 (öğle).
Kaynak: NIST – AM and PM — https://www.nist.gov/pml/time-and-frequency-division/time-telling/am-and-pm