What is the meaning of this sentence

Dying is the day worth living for.

I would summ it up in the following sentence:
Life is worth living.

I don’t know the meaning, Tort, but I take it to mean that the afterlife is worth living for. It could also be morbid and negative, which would make it the opposite of your interpretation.

Yes Mordant, I concur.
On second thought your interpretation makes more sense.