Nowhere does it say that God created anything or anyone else on any days after the 7th day. However, let's NOT forget that their long lengths of lifespans were possible of upto 930 years old, thus having a vast opportunity to pro-create at will.
Yes, we are nearing speculation. But this is just wrong bias and approach to your opinion and speculation.
In Genesis 2, God specifically states that the Garden was planted after the Day of the Lord. Genesis 2 is the first mention, so first principle, concerning the Day of the Lord; and even if we are not told the length of the Day of the Lord. Without knowing the concept of the Day of the Lord, one will continue to incorrectly interpret the entire chapter of Genesis 2.
The general consensus and presupposition is that Genesis 2 is just a retelling of chapter 1, or a recap, or just a different angle with a second creation account. That presupposition is totally wrong.
Here is the thing about people claiming Revelation is not chronological. They then make up their own chronological order. The first 5 chapters of Genesis is a similar portrait of creation. Either one strictly interprets Genesis 1-5 as strictly chronological, or they can view this Scripture as seperate viewpoints only slightly interconnected.
I for one think Revelation is strictly chronological, but Genesis 1-5 are not strictly chronological. Nor is Genesis 2 a recounting of Genesis 1 in reverse order, as some will point out.
The Sabbath is not even mentioned in chapter 1. It is just assumed the 7th day is chronologically the Sabbath. But the second chapter does take off where the first one ends. If the second chapter is chronological, it cannot be a recap of the first chapter at the same time.
Until one can get the relationship between Genesis 1 and 2 worked out, nothing else will even make sense in the other 3 chapters.
And Methuselah lived 969 years. Genesis 5:27
"And all the days of Methuselah were nine hundred sixty and nine years: and he died."
Methuselah died the year of the Flood. We can only speculate why he did not get on the ark and live even longer. Was he punished by God to not live any longer?
After A&E were booted from the Garden, Cain became their 1st born son, then soon after followed their 2nd son, Abel. Gen. 3:23-24, 4:1-3.
Because the birth of "daughters" is never mentioned, "in the process of time" (Gen. 4:3), there must've been pro-creation still taking place between Adam and Eve, bearing alot of daughters for 130 years, before the mentioning of their 3rd son Seth being born. Gen. 4:25.
So, in all reality, A&E had ONLY THREE SONS, but most likely, within that 130 years, A&E (and kin) had MANY daughters, who are never individually mentioned.
Gen. 5
[4] And the days of Adam after he had begotten Seth were eight hundred years: and he begat [only three] sons and daughters [how many, is unknown]:
But, "in the process of time" (Gen. 4:3) let's not forget that Cain moved to Nod and knew his wife (a daughter of A&E??) who most likely went with him to Nod, thus bearing children apart from them dwelling with A&E, and did build a city Gen. 4:16-17
Cain was born. It would have been 30 or 40 years before he would even leave "home", if you consider that was the age of Isaac, and his sons. Just look at the length of time before a son was born and the father was born. I don't see how you think people got married at 18 or 20 years of age, and had 12 kids in 15 years, like today's modern procreation process. It took Jacob 4 wives to have 12 sons.
I don't think Cain and Abel were born post sin. Think about it? How would God have a relationship with them, if they were sinners and banned from the Garden of Eden. It was not like after they were born, they could enter the Garden and just strike up a relationship with God. Not one of Adam's descendants post his disobedience, had a relationship with God, after Adam was banned. Read this point here: Genesis 4:26
"And to Seth, to him also there was born a son; and he called his name Enos: then began men to call upon the name of the Lord."
Adam could not call upon the name of the Lord. Seth could not. It was not until Enos was born, and then Enos could call upon the name of the Lord. You have an impossible situation if Cain and Abel were born between being cast out of the Garden, and the birth of Enos. Cain and Abel would not have been unable to bring any sacrifice to God, outside of the Garden, and could not even call upon the name of the Lord, unless they were without sin, and still in the Garden of Eden. Think of the Garden, as His tabernacle on earth prior to mount Sinai, and the Law. That is where God set up the first alter, and made clothes for Adam and Eve.
Cain and Abel were old enough and left in the Garden , at the point Adam and Eve were cast out. Then Cain was also cast out of the Garden when he killed Abel. And there were way more sons of God across the earth, that Cain married one of them, not a sister that would be born after Seth. My theory would be that Adam and Eve were on probation for 100 years, and could not have any children. Cain could have been in the Garden for a majority of those years, until he was around 100. Isaiah 65 points out that at 100 from God's perspective one is still a child, and not quite mature. Cain rebelled sometime before a hundred, because he could never get over his jealous youthful thoughts. When Abel did die, it was close to the end of those 130 years when Seth was born. Also Abel could leave and visit Adam and Eve. They could not enter the Garden and visit Abel.
To say that Cain, the first born of A&E, took a wife, is to spectulate that one of three things happened:
1. A&E were not the only man and woman created by God, being that there were numerous Adams and Eves.
2. Pro-creation took place within the immediate family and kin.of A&E, thus the beginning of populating the earth.
3. God created A&E separately, apart from another creation, that had been already populating the earth outside of the Garden.
I for one, having shown my explanation, do select item #2, as being the most realistic speculation of how the world began to be populated.
The world was populated during the Day of the Lord by the sons of God, before sin even entered. Even generations, plural, took place. It states it right there in Genesis 2:3-4
"And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.
These are the generations of the heavens and of the earth when they were created, in
the day that the Lord God made the earth and the heavens."
This is the Lord God viewing time from His perspective including the 6 literal days of creation, as a Day of the Lord, while all living things spread across the earth to fill and subdue the earth, just like the time frame at the end, when Jesus reigns physically on the earth.
"And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth."
That all literally happened during the Sabbath Day of the Lord. The sons of God spread out and filled and subdued the earth, because that was the purpose of creation. That all happened before God planted a Garden and put one son of God, in that Garden, whom God name Adam in the process of Adam naming all the animals.
"And the Lord God said, It is not good that the man (no name) should be alone; I will make him an help meet for him. And out of the ground the Lord God formed every beast of the field, and every fowl of the air; and brought them unto Adam (God named the man) to see what he would call them: and whatsoever Adam called every living creature, that was the name thereof. And Adam gave names to all."
I don't think Adam was created nor all these animals seperate from the 6th day. I think they all were put into the Garden that was planted after the Sabbath Day of the Lord. The Garden was not created. The Garden was planted after the sons of God had already subdued the rest of the earth. Now God is setting up His place of worship on the the earth and Adam was the first priest of Paradise.
Adam, in the Garden, would have been the only church placed on earth to come too. Since Adam disobeyed, God waited until Israel had to be called out of Egypt, to set up the second tabernacle on earth.