'Day' in the Bible

I became 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, each one of them having respectively six wings; round and within they are full of eyes; and they cease not day and night saying, Holy, holy, holy, Lord God Almighty, who was, and who is, and who is to come.

because the great day of his wrath is come, and who is able to stand?

Therefore are they before the throne of God, and serve him day and night in his temple, and he that sits upon the throne shall spread his tabernacle over them.

And the fourth angel sounded his trumpet: and the third part of the sun was smitten, and the third part of the moon, and the third part of the stars; so that the third part of them should be darkened, and that the day should not appear for the third part of it, and the night the same.

And the four angels were loosed, who are prepared for the hour and day and month and year, that they might slay the third part of men;

And I heard a great voice in the 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 has been cast out, who accused them before our God day and night:

And the smoke of their torment goes up to ages of ages, and they have no respite day and night who do homage to the beast and to its image, and if any one receive the mark of its name.

for they are the spirits of demons, doing signs; which go out to the kings of the whole habitable world to gather them together to the war of that great day of God the Almighty.

for this reason in one day shall her plagues come, death and grief and famine, and she shall be burnt with fire; for strong is the Lord God who has judged her.

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

And its gates shall not be shut at all by day, for night shall not be there.