https://answersingenesis.org/days-of-cr ... -six-days/
Objection 2
Answer:According to Genesis 1, the sun was not created until Day 4. How could there be day and night (ordinary days) without the sun for the first three days?
If the sun is not needed to make a 24 hour, or ordinary day, why is it that the time between the sun appearing in the same spot in the sky, from day to day, is 24 hours?Again, it is important for us to let the language of God’s Word speak to us. If we come to Genesis 1 without any outside influences, as has been shown, each of the six days of creation appears with the Hebrew word yom qualified by a number and the phrase “evening and morning.” The first three days are written the same way as the next three. So if we let the language speak to us, all six days were ordinary earth days.
The sun is not needed for day and night. What is needed is light and a rotating earth. On the first day of creation, God made light (Genesis 1:3). The phrase “evening and morning” certainly implies a rotating earth. Thus, if we have light from one direction, and a spinning earth, there can be day and night.
Where did the light come from? We are not told,27 but Genesis 1:3 certainly indicates it was a created light to provide day and night until God made the sun on Day 4 to rule the day. Revelation 21:23 tells us that one day the sun will not be needed because the glory of God will light the heavenly city.
http://www.universetoday.com/47181/earths-rotation/
So, in other words, according to AIG, instead of the sun being the reason why the first 3 creation days were ordinary 24 hour days, God created a point of light, which wherever it was, perfectly mimicked the intensity of the sun at its distance from the earth. In other words, from where the sun is in relation to the earth, it lets off a certain amount of light. And that exact amount of light is visible at its exact intensity, in regards to the position the earth is in when it rotates.To answer the second question first, it takes exactly 24 hours for the Sun to return to the same spot in the sky, which would seem obvious. 24 hours is what we think of as being a complete day, and the time it takes to transition from day to night, and back again.
So, we can believe what Ham and other YECs say. That there was some other light that God created before they say the sun existed on day 4 which perfectly mimicked the light of the sun. And we can also believe that since according to YECs, the moon wasn't created until day 4 either. But the moon and to a lesser degree the sun, both give the earth its rotational speed, which is the 24 hours that makes up Ken Ham's ordinary day. Is anyone else seeing how ridiculous the YEC concept of an ordinary day is?
Take the YEC interpretation of scripture, which defies logic and science. Or, take another interpretation, which is still valid under a grammatical historical hermeneutic, AND, doesn't defy logic.
So, we can believe:
1. The sun wasn't created until day 4. But there was a point of light with the exact size and intensity of the sun that did exist, until God replaced that point of light with the sun on day 4.
And God sustained the earth's rotating speed, by some means other than by the moon and sun, which sustains the earth's rotating speed today.
Or
2. The sun and moon were created on or before day 1. And the sun and moon are responsible, and always have been, for the earth's rotation speed, which gives us a 24 hour day.
And please know, that if one holds to #2, or something other than #1, it doesn't mean one ignores scripture, or takes science over scripture. It just means one interprets scripture differently.