'Day' in the Bible

I was in the Spirit on the Lord's day, and a great voice at my back, as of a horn, came to my ears,

And the four beasts, having every one of them six wings, are full of eyes round about and inside: and without resting day and night, they say, Holy, holy, holy, Lord God, Ruler of all, who was and is and is to come.

For the great day of their wrath is come, and who may keep his place?

This is why they are before the high seat of God; and they are his servants day and night in his house: and he who is seated on the high seat will be a tent over them.

And at the sounding of the fourth angel, a third part of the sun, and of the moon, and of the stars was made dark, so that there was no light for a third part of the day and of the night.

And the four angels were made free, who were ready for the hour and day and month and year, that they might put to death a third part of men.

And a great voice in heaven came to my ears, saying, Now is come the salvation, and the power, and the kingdom of our God, and the authority of his Christ: because he who says evil against our brothers before our God day and night is forced down.

And the smoke of their pain goes up for ever and ever; and they have no rest day and night, who give worship to the beast and his image, and have on them the mark of his name.

For they are evil spirits, working signs; who go out even to the kings of all the earth, to get them together to the war of the great day of God, the Ruler of all.

For this reason in one day will her troubles come, death and sorrow and need of food; and she will be completely burned with fire; for strong is the Lord God who is her judge.

And the Evil One who put them in error was sent down into the sea of ever-burning fire, where the beast and the false prophet are, and their punishment will go on day and night for ever and ever.

And the doors of it will never be shut by day (for there is no night there):