During the seven day creation process God said it was good or very good meaning it was without flaw, perfect just as He is perfect and Holy, without sin. Searching for a seven day event representing no sin brought me to the Feast of Unleaven Bread.
 
Meaning Feast of Unleaven Bread represents creation which is normally called Passover, a time when all leaven (sin ) is removed during the week to restore what was in creation. The month containing Passover is the first month of the year for Israel ( Exodus 12:1-2 ). Any yes, I am saing it was in the spring.  Many things about Israel involves Passover; they entered Egypt on Passover and left on Passover. ( Exodus 12:40-41). This is a story of history repeating itself from creation to the end of the sixth day or 6000 years. For a second witness I chose Irenaeus who was taught by a disciple of Apostle John. The excerpts:
 
The devil is well practiced in falsehood, by which Adam having been led astray, sinned on sixth day of creation, in which day also he has been renewed by Christ.
 
Thus, then, in the same day that they ate, they became debtors to death, since it is one day of creation. If anyone seeks diligently to learn upon which day out of seven Adam died, he will find it by examining the dispensation of the Lord. For by summing up in Himself the whole human race from the beginning to the end. From this it is clear that the Lord suffered death in obedience to his Father, upon the day Adam died. For God said, in the day on which you shall eat, you shall die from death.
 
The Lord, therefore, recapitulating in Himself this day, underwent his sufferings upon the day preceding the Sabbath, that is the sixth day of creation. Thus granting him a second creation by means of his passion. With respect to the same day on which they ate, they also died, that is the day of Preparation, which is termed the pure supper, that is, the sixth day of the feast. (end)
 
 As in the garden of Eden, so happened in the garden of Gethsemane, for here He was arrested, and crucified in same garden, and here he will return after the tribulation on the Mt of Olives. As Jesus expired on the cross the jews were killing the lambs for the one day Passover, on the Day of Preparation.
 
Many fail to realize how creation is tied in to end for God declared in Isaiah 46--" I have declared the end from the beginning." When on the cross Jesus said--"Father, forgive them" meaning the gentiles, for we are in the times of the gentiles. And Jesus also said, "It is finished", a prophecy concerning the future and the sixth day or 6000 years. For the antichrist will take his seat in the Temple of God on the sixth day of the week, in the middle of the tribulation, the day before the Sabbath and the Day of the Lord.
 
The approx. three years of ministry of the Lord represents also the travels the antichrist will take leading up to him becoming king of Israel in middle of the seven. As an example why did the Lord go to Tyre and Sidon outside Israel?  Lord was showing this is the first of his conquests as he comes to power, and before he conquers Egypt, Libya, and Ethiopia as spoken by the prophet Daniel --(excerpt from Hippoyltus)
 

52. In those times, then, he shall arise and meet them. And when he has overmastered three horns out of the ten in the array of

war, and has rooted these out, viz., Egypt, and Libya, and Ethiopia, and has got their spoils and trappings, and has brought the remaining horns which suffer into subjection, he will begin to be lifted up in heart, and to exalt himself against God as master of the whole world. And his first expedition will be against Tyre and Berytus (Beirut), and the circumjacent territory. For by storming these cities first he will strike terror into the others, as Isaiah says, Be ashamed, O Sidon; the sea has spoken, even the strength of the sea has spoken, saying, I travailed not, nor brought forth children; neither did I nurse up young men, nor bring up virgins. But when the report comes to Egypt, pain shall seize them for Tyre.

I have said some hard things to understand but creation does foretell the end. As the antichrist is the unjust judge, and the widow is Jerusalem. The day we seek is the Day of the Lord, the most spoken of event in all the Bible.