What is E-day?
1.
On July 8, 2345 when all the nations of Earth united, putting aside former disputes, if only temporarily, to destroy an extraterrestrial threat seeking to consume the planet's natural resources, enslave it's surviving people, and expand their own empire and political influence.
On E-day almost 1 billion people died at a position halfway between the Moon and the Earth known as L-1.
2.
An imaginary day in 2345 made up by Fred! On this day Fred! predicts that the Earth will unite against evil aliens at a place reffered to as L-1.
TRKS: Have you heard of E-Day?
John: No, what's E-Day?
TRKS: It's crazy Fred!'s imaginary way of contributing to urban dictionary.