When did Jehovah die?

When did Jehovah die?

Revelation 1:8  
“I am the Al′pha and the O·me′ga,” says Jehovah God, “the One who is and who was and who is coming, the Almighty.”

Alpha is the First letter of the Greek alphabet.
(Α or α)
Omega is the Last letter of the Greek alphabet.
(Ω or ω))

Revelation 1:17: says,
“Do not be afraid. I am the First and the Last, 18  and the living one, and I became dead, but look! I am living forever and ever, and I have the keys of death and of the Grave"

Jehovah is the Al′pha and the O·me′ga - the First and the Last.

The question has to be asked - When did Jehovah die?