Dwight Eisenhower
No it was not.
D-Day was in planning for over a year.
From the Allied Forces group that planned D-Day, COSSAC.
June 6th, I think.
D-Day did not come before world war 2 and a D-Day never comes before a war - it is a planned attack/mission/operation during a war. D-Day is the first day of the battle or operation. The subsequent days are called D day plus 2, D Day plus 3 and so on until the battle or operation is over.
D-Day was about defeating Germany. It was not 'planned to free the Jews'. Freeing the Jews didn't figure anywhere in Allied war aims.
D. Eisenhower
It was Operation Overlord. D-Day was the first day.
Dwight Eisenhower led the group that planned and organised D-Day
D-Day was the long planned Allied invasion of German held France to liberate Europe.
A committee and planning staff led by British General Morgan planned it for almost 3 years before it happened.