What does N-day stand for?
M-day. The term used to designate the unnamed day on which full mobilization commences or is due to commence. i. N-day. The unnamed day an active duty unit is notified for deployment or redeployment. j. R-day. Redeployment day. The day on which redeployment of major combat, combat support, and combat service support forces begins in an operation. k.