I dont know how old the earth is. I dont know when He said a day to Him is as a thousand years really meant a thousand years to us or if it meant that to Him time meant nothing and was irrelevant. It may have been symbolism.
You loose! Time was established for humans, not God. The Verse in Peter you are referring to reference His patience toward sinners wanting them to come to Him and be saved. God is not in time or space like we know them. He fills them in all directions at the same time. His Word is very clear. He established a day from the first dark / light cycle. And since He is in charge He called it night and day. On the forth day He gave us an indisputable reference even for the slowest of us. He recorded for us in Genesis 1:14-19,
"Then God said, 'Let there be lights in the expanse of the heavens to separate the day from the night, and let them be for signs and for seasons and for days and years; and let them be for lights in the expanse of the heavens to give light on the earth'; and it was so. God made the two great lights, the greater light to govern the day, and the lesser light to govern the night; He made the stars also. God placed them in the expanse of the heavens to give light on the earth, and to govern the day and the night, and to separate the light from the darkness; and God saw that it was good. There was evening and there was morning, a fourth day."
"Only Christ is the fullness of God's revelation." Everyday Hunter
