What does S-day stand for?

S-day stands for "day the President authorizes selective reserve call-up"

How to abbreviate "day the President authorizes selective reserve call-up"?

"day the President authorizes selective reserve call-up" can be abbreviated as S-day

What is the meaning of S-day abbreviation?

The meaning of S-day abbreviation is "day the President authorizes selective reserve call-up"

What does S-day mean?

S-day as abbreviation means "day the President authorizes selective reserve call-up"