This is my "short answer." If you have questions about day 4 etc. just ask.
Interpreting the days as long periods:
1) The phrase "In the beginning" (bereshit) always refers to a period of time in the Old Testament. This exact phrase is used only four other times in the Old Testament (Jeremiah 26:1, 27:1, 28:1, 49:34) and once with a slight variation (Hosea 9:10). One of these does not give a definition of the meaning of the phrase, but four of them do. Jeremiah 28:1 defines both here and 27:1 as encompassing the first four years of Zedekiah's eleven-year reign; about 36% of his entire reign (see Jere. 52:1). The same can be said of Jehoiakim's 11 yr. reign (see Jere. 26:1; 25:1 and 36:5). Hosea 9:10 uses the variation of the phrase to speak of a fig tree's first fruit-bearing season. All of these are periods of time and rule against "In the beginning" of Genesis 1:1 being restricted to an instant or some other part of a 24-hour period. Job 38:4-9 and Ps. 104:5-6 tell us some of what happened "In the beginning."
The one unclear passage in Jeremiah 49:34 must refer to some time within the first four years, and may also refer to Zedekiah's 4th year. I would suggest that any time after his first day on the throne would rule against the young-earth view.
2) On day three God told the land to do the producing and the Hebrew is clear that it was the land that produced the plants. God may have seeded the earth, but the text indicates natural growth (see Mark 4:26-29 and Isaiah 61:11).
3) Now let's look at the “7th day.” It does not have the phrase “and was evening and was morning.” The seventh day is separate from the six days of work. Instead of on the seventh day, closing the sixth day with “and was evening”, God simply closes off the workweek (Gen. 2:1). “And was morning” is not used on day seven, because it is not the dawning of another workday. The whole 7th day is God's rest (Gen. 2:2-3):
In the New Testament we are given more information about this day. Hebrews 4:1-11 reads:2. By the seventh day God completed His work which He had made, and He rested on the seventh day from all His work which He had made.
“3. Then God blessed the seventh day and sanctified it, because in it He rested from all His work which God had created to make.
The writer of Hebrews could not have been clearer; God's “SEVENTH DAY” has not ended. Throughout Hebrews chapters three and four we are told that we may enter into God's rest. The only places in these chapters that His rest is defined are in 4:3-4 and 9 where it is defined as the Seventh day of creation and is called "a Sabbath Observance/Keeping." Yes, we enter through faith, but it is God's Sabbath rest we are joining Him in!1. Therefore, let us fear lest, while a promise remains of entering His rest, any one of you should seem to have come short of it.
2. For indeed we have had good news preached to us, just as they also; but the word they heard did not profit them, because it was not united by faith in those who heard.
3. For we who have believed enter that rest, just as He has said, 'AS I SWORE IN MY WRATH, THEY SHALL NOT ENTER MY REST,' although those works were finished from the foundation of the world.
4. For He has said somewhere concerning the seventh day, 'AND GOD RESTED ON THE SEVENTH DAY FROM ALL HIS WORKS';
5. and again in this passage, 'THEY SHALL NOT ENTER MY REST.'
6. Therefore, since it remains for some to enter it, and those who formerly had good news preached to them failed to enter because of disobedience,
7. He again fixes a certain day, 'Today,' saying through David after so long a time just as has been said before, 'TODAY IF YOU HEAR HIS VOICE, DO NOT HARDEN YOUR HEARTS.'
8. For if Joshua had given them rest, He would not have spoken of another day after that.
9. So there remains a Sabbath rest for the people of God.
10. For the one who has entered His rest has himself also rested from his works, as God did from His.
11. Therefore let us be diligent to enter that rest, so that no one will fall, through following the same example of disobedience.(NASB)
Jesus says the same thing in John 5:17:
Why did Jesus make this statement? He had just been accused of breaking the Sabbath (John 5:7-18). Jesus had healed a man and told him to pick up his bed and walk. The Jewish leaders considered healing a “work” that should be done during the first 6 days, not on the Sabbath (see Luke 13:14, 6:7, Matthew 12:10).But He answered them, 'My Father is working until now, and I Myself am working.'
God is not of this world, so He is not constrained by our Sabbath. The only way Jesus' argument makes sense is if He is referring to the Father continuing His “works” of compassion as well as directing and sustaining creation (Heb. 1:3 and Col. 1:17), while His Sabbath rest from creating new things is ongoing. Likewise, Jesus was doing a “work” of compassion, not occupation or labor, on the earthly Sabbath.
One young-earth creationist, Andrew S. Kulikovsky, has attempted to counter the seventh day argument by saying that the “rest” of Hebrews 3 and 4 is the Kingdom of God. The first thing to point out is that the “Kingdom” is not mentioned anywhere in the text. As mentioned above, we may join God in His “rest” through faith, but the way in which we enter by no means defines what we are entering into. Second, as shown above, verses 3-4 and 9 actually define the rest as the “Seventh day” and “a Sabbath keeping.” The fact that the Sabbath observance is equivalent to the Seventh day can be seen in Moses' writings. By comparing the way Moses restated Genesis 2:2b-3a in Exodus 20:11 we can see the equivalence.
Notice how Moses replaces the words “seventh day” in Gen. 2:3a with the words “Sabbath day” in Ex. 20:11b.Gen. 2:2b — “…and He rested on the seventh day from all His work which He had made.”
Ex. 20:11a — “For in six days the LORD made the heavens and the earth, the sea and all that is in them, and rested on the seventh day…”
Gen. 2:3a — “Then God blessed the seventh day and sanctified it…”
Ex. 20:11b — “therefore the LORD blessed the Sabbath day and made it holy.”
Exodus 31:15 also puts the seventh/ Sabbath connection together as well as the Sabbath-keeping/observance. Here it reads:
Six days you may do work, but on the Seventh day, a Sabbath (Shabbat) of Sabbath Observance (Shabbaton), holy to the Lord; everyone that does work on the Sabbath (Shabbat) must die.
The Greek noun suffix "ismos," used in Hebrews 4:9, denotes the act, state, condition or doctrine of. So the Greek word sabbatismos actually means "a Sabbath observance." Of course the Sabbath is observed through resting, which is what the text is about. So, the Greek Sabbatismos and the Hebrew Shabbaton seem to be equivalent terms, meaning — Sabbath keeping or observance; which is accomplished by resting (ceasing) from work.
The author of Hebrews seems to be using Moses' own words when he defines the rest that we may join God in as the seventh day of creation (Heb. 4:3-4) and then says that "a Sabbath keeping" or "a Sabbath observance" (sabbatismos) remains for the people of God (Heb. 4:9). The seventh day of creation, in which God is adhering to sabbatismos, is the rest that we may join Him in, through faith.
4) The sixth day is described in chapter 2:5 onward. In fact it may not end until the end of chapter three. A rain waters the land, a garden grows, Adam names a bunch of animals, etc. Remember, from a 24-hour day view Exodus 20:11 gives an exact equation between God's workweek and man's. Therefore, the pattern must be followed for the periods of work and rest. This means that all of the day 6 activities must take place in only 12 hours. This is the work period for man (Ps. 104:20-23). I used this text because it is one of the other texts dealing with creation.
I hope this helps.