'Day' in the Bible

who shall also confirm you to the end, unimpeachable in the day of our Lord Jesus Christ.

the work of each shall be made manifest; for the day shall declare it, because it is revealed in fire; and the fire shall try the work of each what it is.

But for me it is the very smallest matter that I be examined of you or of man's day. Nor do I even examine myself.

to deliver him, I say, being such, to Satan for destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.

Neither let us commit fornication, as some of them committed fornication, and fell in one day three and twenty thousand.

and that he was buried; and that he was raised the third day, according to the scriptures;