'Day of the Lord' in the Bible

the sun shall be changed to darkness and the moon to blood, before the great and gloriously appearing day of the Lord come.

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.

even as also ye have recognised us in part, that we are your boast, even as ye are ours in the day of the Lord Jesus.

for ye know perfectly well yourselves, that the day of the Lord so comes as a thief by night.

that ye be not soon shaken in mind, nor troubled, neither by spirit, nor by word, nor by letter, as if it were by us, as that the day of the Lord is present.

But the day of the Lord will come as a thief, in which the heavens will pass away with a rushing noise, and the elements, burning with heat, shall be dissolved, and the earth and the works in it shall be burnt up.