'Day' in the Bible

I was in the Spirit on the Lord's day, and I heard behind me a great voice, as of a trumpet

and the four living creatures, having each one of them six wings, are full of eyes round about and within: and they have no rest day and night, saying, Holy, holy, holy, is the Lord God, the Almighty, who was and who is and who is to come.

for the great day of their wrath is come; and who is able to stand?

Therefore are they before the throne of God; and they serve him day and night in his temple: and he that sitteth on the throne shall spread his tabernacle over them.

And the fourth angel sounded, and the third part of the sun was smitten, and the third part of the moon, and the third part of the stars; that the third part of them should be darkened, and the day should not shine for the third part of it, and the night in like manner.

And the four angels were loosed, that had been prepared for the hour and day and month and year, that they should kill the third part of men.

And I heard a great voice in heaven, saying, Now is come the salvation, and the power, and the kingdom of our God, and the authority of his Christ: for the accuser of our brethren is cast down, who accuseth them before our God day and night.

and the smoke of their torment goeth up for ever and ever; and they have no rest day and night, they that worship the beast and his image, and whoso receiveth the mark of his name.

for they are spirits of demons, working signs; which go forth unto the kings of the whole world, to gather them together unto the war of the great day of God, the Almighty.

Therefore in one day shall her plagues come, death, and mourning, and famine; and she shall be utterly burned with fire; for strong is the Lord God who judged her.

And the devil that deceived them was cast into the lake of fire and brimstone, where are also the beast and the false prophet; and they shall be tormented day and night for ever and ever.

And the gates thereof shall in no wise be shut by day (for there shall be no night there):