The same Creator that had Moses pen Genesis, is the same Creator that had Peter pen how God keeps time. Ignoring God is taking God out of His context.
Context is your key to understanding the Word.
What is being discussed in 2 Peter 3?
You have to read the whole section to get the meaning.
Does the text say "one day is as a thousand years" or "one day is a thousand years" ?
It has nothing to do with Creation as some have tried to justify a non-literal reading of the Genesis text with 2 Peter 3:8 ignoring the use of yom and the ordinal number as I previously explained.
God is not One who confuses things.
2 That ye may be mindful of the words which were spoken BEFORE by the holy prophets, and of the commandment of us the apostles of the Lord and Savior:
The first heaven/earth world (age) was destroyed as described in Genesis 1:2. Did you read how many times Peter used the phrase 'willingly ignorant'?
Christ, Peter, John and Paul refer to Genesis 1:2 called it the katabole Matt. 13:35, 25:34. Luke 11:50 John 17:24 Eph 1:4, Heb 4:3: 9:26; 11:11 Peter 1:20: Rev. 13:8: 17:8 A noun that means casting down, or overthrow.
Isaiah 14:12 and Ezekiel 28:12-19 tell the who that was cast down and overthrown.
And it happened before Genesis 1:2.
Hebrews 2:14 Forasmuch then as the children are partakers of flesh an blood, (what were the children before they partook in flesh and blood?) He also Himself likewise took part of the same; (flesh and blood) that through death He might destroy him that had the power of death, that is the devil;