Scripture Declares the Days to be Long
Specific biblical examples of evidence for long creation days include:
1. The "Day of the Lord" refers to a seven year period of time.
2. Genesis 2:4 refers to all 6 days of creation as one day, "This is the account of the heavens and the earth when they were created, in the day that the Lord God made earth and heaven."
3. The seventh day of Genesis is not closed. In all other days, "there is the evening and the morning, the n day."
4. In the book of Hebrews, the author tells us to labor to enter into God's seventh day of rest. By any calculation, God's seventh day of rest has been at least 6,000 years long:
For He has thus said somewhere concerning the seventh day, "And God rested on the seventh day from all His works"... Let us therefore be diligent to enter that rest, lest anyone fall through following the same example of disobedience. (Hebrews 4:4-11)
5. The psalmist (Moses, the author of Genesis) says "For a thousand years in Thy sight are like yesterday when it passes by, or as a watch in the night." (Psalms 90:4).
6. The apostle Peter tells us with God "A thousand years is as one day" (2 Peter 3:8).
7. The third day must have been longer than 24-hours, since the text indicates a process that would take a year or longer. On this day, God allowed the land to produce vegetation, tress and fruit. The text specifically states that the land produced trees that bore fruit with seed in it (3). Any horticulturist knows that fruit-bearing trees requires several years to grow to produce fruit. However, the text states that the land produced these trees (indicating a natural process) and that it all occurred on the third day. Obviously, such a "day" could not have been only 24 hours long.
8. The events of the sixth day of creation require time beyond 24 hours. On this day, God created the mammals and mankind. He also planted a garden, watered it, let it grow, and put man in it, with instruction on its care and maintenance. Then God brought all the animals to Adam to be named. This job, in itself would take many days or weeks. Next, God put Adam to sleep and created Eve. It is very unlikely all of this could take place in 24 hours, since much of it was dependent upon Adam, who did not have the abilities of God.
9. The Bible itself states that the covenant and laws of God have been proclaimed to a "thousand generations" (Deuteronomy 7:9, 1 Chronicles 16:15, Psalms 105:8). Even if a generation is considered to be 20 years, this adds up to at least 20,000 years. A biblical generation is often described as being 40 years, which would represent at least 40,000 years. However, since the first dozen or more generations were nearly 1,000 years, this would make humans nearly 50,000 years old, which agrees very well with dates from paleontology and molecular biology (see Descent of Mankind Theory: Disproved by Molecular Biology).
Early Church Fathers Believed the Creation Days were Long
The belief that creation days are long periods of time is not just a recent interpretation of the scriptures, but was prevalent since the first century. Dr. Ross has published a book entitled Creation and Time, which documents in detail what first century Jewish scholars and the early Christian church fathers said regarding their interpretation of creation chronology (5). Jewish scholars include Philo and Josephus, while Christian fathers include Justin Martyr, Irenaeus, Hippolytus (through writings of Ambrose), Clement, Origen, Lactantius, Victorinus, Methodius, Augustine, Eusebius, Basil, and Ambrose. Among this group, nearly all acknowledged the likelihood that the creation days were longer than 24 hours. The evidence presented in Creation and Time is both overwhelming and well documented (all references are given). You can read and/or download translations of the actual text of all of the early church fathers at Wheaton College's server. The collection consists of nearly forty files, averaging ~2 mb each. Alternatively, these writings can be obtained on CD from Logos Research.
All of this biblical and historical evidence has led us to conclude that the days of Genesis 1 are not literal 24 hour days, but long periods of time during which God chose to create different species of life.
Appearance of Age
If God had created the universe in an instant, there would be no evidence from nature that He created it. The Bible states God has shown himself to all men through His creation so that men are without excuse in rejecting God (6). In addition, the universe declares God's glory, which is a sum of God's innate and unchangeable character (7). The Bible also states the universe declares God's righteousness (8). God's righteousness prevents Him from sinning. The scriptures say God cannot lie (9).
Therefore, from the Bible, we conclude that God does not lie or deceive, either from His word or from His record of nature. The heavens declare the universe to be at least 10 billion years old. In addition, we have the ability to see galaxies in the universe which are billions of light years away. If one claims the universe is 6,000 years old, he must state that God created the light from these distant galaxies in transit less than 6,000 light years from the earth. There are signs that the light has indeed been in transit for very long periods of time and was not somehow created in space relatively recently. Frequencies of known spectral lines show spreading or broadening which would occur after long travel times through space containing dust and debris. Since this light appears to be very old and to have originated from a point billions of light years away, if the universe is actually 6,000 years old, the heavens must be declaring a lie, an apparently old universe which is actually very young.
Let me give one example. For now let us assume the universe is 6 to 10 thousand years old and God created the light-beams already in place. Say we are watching a star in our telescope which is two million light years away, and we notice that it explodes (yes, supernova explosions have been observed). That means the light reaching us now is carrying the information recording this distant happening. Now trace this part of the light beam backwards in time along the path of the light beam. By the time you get back to the time of creation (6 to 10 thousand years ago) you have reached a point which is less than 1 percent of the distance to the star. This would mean that the "explosion" part of the light-beam began its journey from here - and not from the star! Thus, the information recording this explosion had to be "built-in" to the light beam, so what we see as having happened to that star may never have happened at all. The idea that observation of things further than around 10,000 light-years away is not necessarily linked to physical reality would be unsettling from both a scientific and theological viewpoint. I cannot accept a God who lies by creating deceptions.
Appearance of Age Rebuttals
Many have asked the following question: Since God probably created Adam full grown and mature why couldn't God have done the same thing with the universe? First, note that God had a choice of creating Adam adult sized, or as a baby. Obviously if Adam was created as a baby, God would have to provide a means of nurturing him. This would require some special agency or being, or God could have made Adam a very special baby who did not require special care. Although God could have done any of these things, we believe God operates according to the principle of simplicity. Thus, He simply created the first man full-sized. However, Adam's body did not necessarily have signs of age. Size by itself is not an indication of age except perhaps to tell that the person is not a child. If a doctor examines an adult to determine age he might look at skin condition, liver spot progression, hair, teeth, cholesterol level, metabolism, scars, etc. I believe that Adam's body had none of these signs of age. God created Adam sinless, with no spiritual deterioration, and I believe He also created Adam with a perfect body, with no physical deterioration. Thus I do not believe Adam had an "apparent age."
Other arguments often used to support the appearance of age argument is the wine that Jesus made from water. It was the best wine, implying that it was aged. However, the wine may or may not have had the chemical components of aged wine.
Ultimately, the downfall of the appearance of age argument is that the Bible never supports this idea with regard to the creation. The Bible explains the miracles of God and tells us when things were made as if they were old (like the wine that Jesus made from water). In contrast, there is not one verse in the Bible that suggests that God made the Earth look older than it actually is.