'Day' in the Bible

Who will give you strength to the end, to be free from all sin in the day of our Lord Jesus Christ.

Every man's work will be made clear in that day, because it will be tested by fire; and the fire itself will make clear the quality of every man's work.

That this man is to be handed over to Satan for the destruction of the flesh, so that his spirit may have forgiveness in the day of the Lord Jesus.

Again, let us not give way to the desires of the flesh, as some of them did, of whom twenty-three thousand came to their end in one day.

And he was put in the place of the dead; and on the third day he came back from the dead, as it says in the Writings;

On the first day of the week, let every one of you put by him in store, in measure as he has done well in business, so that it may not be necessary to get money together when I come.