'Day of the Lord' in the Bible

The sun shall be turned into darkness and the moon into blood, to usher in the day of the Lord-- that great and illustrious day;

I have handed over such a man to Satan for the destruction of his body, that his spirit may be saved on the day of the Lord Jesus.

For you yourselves know perfectly well that the day of the Lord comes like a thief in the night.

not readily to become unsettled in mind or troubled--either by any pretended spiritual revelation or by any message or letter claiming to have been sent by us--through fancying that the day of the Lord is now here.

The day of the Lord will come like a thief--it will be a day on which the heavens will pass away with a rushing noise, the elements be destroyed in the fierce heat, and the earth and all the works of man be utterly burnt up.

In the Spirit I found myself present on the day of the Lord, and I heard behind me a loud voice which resembled the blast of a trumpet.