M-DAY
Meaning of M-DAY in English
transcription, транскрипция: [ ˈem-ˌdā ]
noun
Etymology: m obilization day
Date: 1924
: a day on which a military mobilization is to begin
Merriam-Webster's Collegiate English vocabulary.
Энциклопедический словарь английского языка Merriam Webster.
2003