The Eighth Day 2 Enoch

God shows Enoch the age of this world, its existence of seven thousand years, and the eighth thousand is the end, neither years, nor months, nor weeks, nor days

2Enoch 33:1 And I appointed the eighth day also, that the eighth day should be the first-created after my work, that it should revolve in the revolution of the seventh thousand, so that the eighth thousand might be in the beginning of a time not reckoned and unending with neither years nor months nor weeks nor days nor hours like the first day of the week, so also that the eighth day of the week might return continually.
2 And now, Enoch, all that I have told thee, all that thou hast understood, all that thou hast seen of heavenly things, all that thou hast seen on earth, and all that I have written in books by my great wisdom, all these things I have devised and created from the uppermost foundation to the lower and to the end, and there is no counsellor nor inheritor to my creations.
3 I am self-eternal, not made with hands, and without change.
4 My thought is my counsellor, my wisdom and my word are made, and my eyes observe all things how they stand here and tremble with terror.

On the Origin of the World After the day of rest, Sophia sent her daughter Zoe, being called Eve, as an instructor, in order that she might make Adam, who had no soul, arise, so that those whom he should engender might become containers of light. When Eve saw her male counterpart prostrate, she had pity upon him, and she said, "Adam! Become alive! Arise upon the earth!" Immediately her word became accomplished fact. For Adam, having arisen, suddenly opened his eyes. When he saw her, he said, "You shall be called 'Mother of the Living'. For it is you who have given me life.

Now the first Adam, (Adam) of Light, is spirit-endowed and appeared on the first day. The second Adam is soul-endowed and appeared on the sixth day, which is called Aphrodite. The third Adam is a creature of the earth, that is, the man of the law, and he appeared on the eighth day [...] the tranquility of poverty, which is called "The Day of the Sun" (Sunday). And the progeny of the earthly Adam became numerous and was completed, and produced within itself every kind of scientific information of the soul-endowed Adam. But all were in ignorance.

The big find in Barnabas is chapter 15, concerning the sabbath, which says...

1 Furthermore it was written concerning the Sabbath in the ten words which he spake on Mount Sinai face to face to Moses. "Sanctify also the Sabbath of the Lord with pure hands and a pure heart."
2 And in another place he says, "If my sons keep the Sabbath, then will I bestow my mercy upon them."
3 He speaks of the Sabbath at the beginning of the Creation, "And God made in 6x days the works of his hands and on the 7th day he made an end, and rested in it and sanctified it."
4 Notice, children, what is the meaning of "He made an end in 6 days"? He means this: that the Lord will make an end of everything in 6,000 years, for a day with him means a thousand years. And he himself is my witness when he says, "Lo, the day of the Lord shall be as a thousand years." So then, children, in 6 days, that is in 6 thousand years, everything will be completed.
5 "And he rested on the 7th day." This means, when his Son comes [at the start of that day] he will destroy the time of the wicked one, and will judge the godless, and will change the sun and the moon and the stars, and then he will truly rest on the 7th day [Amen].
6 Furthermore he says, "Thou shalt sanctify it with clean hands and a pure heart." If, then, anyone has at present the power to keep holy the day which God made holy, by being pure in heart, we are altogether deceived.
7 See that we shall indeed keep it holy at that time, when we enjoy true rest, when we shall be able to do so because we have been made righteous ourselves and have received the promise, when there is no more sin, but all things have been made new by the Lord  then we shall be able to keep it holy because we ourselves have first been made holy.
8 Furthermore he says to them, "Your new moons and the sabbaths I cannot away with." Do you see what he means? The present sabbaths are not acceptable to me, but that which I have made, in which I will give rest to all things and make the beginning of an eighth day, that is the beginning of another world.
9 Wherefore we also celebrate with gladness the eighth day in which Jesus also rose from the dead, and was made manifest, and ascended into Heaven (Chapter 15)

These Sabbaths will be no longer celebrated on the seventh day. They will be changed from the seventh to the eighth or first day of the week, which are the same. The "dispensation of the fullness of times" (Eph 1:10), popularly styled the Millennium, will be the antitype, or substance, of the Mosaic feast of tabernacles which was "a shadow of things to come." In this type, or pattern, Israel were to rejoice before Yahweh for seven days, beginning "on the fifteenth day of the seventh month, when they had gathered the fruit of the land." In relation to the first day of the seven, the law says, "it shall be a sacred assembly: ye shall do no servile work therein." This was what we call Sunday. The regulation then continues, "on the eighth day," also Sunday, "shall be a sacred assembly unto you, and ye shall offer an offering made by fire unto Yahweh: it is a solemn assembly; and ye shall do no servile work therein." Again, "on the first day shall be a Sabbath, and on the eighth day shall be a Sabbath" (Lev 23:34-43).

Thus the Lord's day, the day of His resurrection from His seventh day imprisonment in the tomb, becomes the sabbath day of the future age which shall be hallowed by the priests of Israel, and be observed by all nations as a day of sacred assembly in which they shall rejoice, and do no manner of servile work at all.

This change of the sabbath from the seventh to the eighth, or first day of the week, is the full development and establishment of the observance of the Lord's day by the disciples of Jesus since the times of the apostles.

The Lord's day is the first day of the week, or day after the seventh, and therefore styled the eighth day. It is termed His day, because it is the week-day of His resurrection. Upon this day the disciples of Christ assembled to show forth His death, and to celebrate His resurrection;