'Day' in the Bible

who will also confirm you until the end, blameless in the day of our Lord Jesus Christ.

each man's work will be revealed. For the Day will declare it, because it is revealed in fire; and the fire itself will test what sort of work each man's work is.

are to deliver such a one to Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.

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

that he was buried, that he was raised on the third day according to the Scriptures,

On the first day of the week, let each one of you save, as he may prosper, that no collections be made when I come.