D-DayWord for the Wise June 06, 2007 Broadcast Topic: D-Day 63 years ago today, Allied forces began invading France.
It was neither the first nor the last time the military has used the term D Day to refer to the day set for launching a specific tactical operation, but the date June 6th, 1944 has become associated with a specific sense of D-Day.
(来源：遥英语学习网站 http://www.
2hzz.
com) We've mentioned before that the D in D-Day stands for Day; designating the launch date of an operation with the name D-Day maintains secrecy while allowing serious planning.
D-Day does not stand alone; other letters have long been paired with the word day to give us sometimes cryptic, sometimes obvious descriptions.
L-Day (sometimes thought to be short for Landing Day) referred to the invasion of Okinawa on April 1st, 1945.
J-Day, for reasons unknown, was used throughout the second world war to refer to the day an assault (especially an amphibious assault) was scheduled.
M-day, short for mobilization day, has two more general senses: the day on which military mobilization begins or is postulated to begin; and the day on which actual hostility breaks out at the commencement of a war.
Finally, of course, there's V-day, where V represents victory.