I would encourage you to read the rest of 2 Peter 3. Perhaps you will see why you are misusing that verse. God is not some old foolish man that has an issue counting his days apart.... ironically, it is exactly the opposite.
I would encourage you to check out my post number 16. I cut and pasted the whole chapter of II Peter 3. I did not misuse any verse. Peter was quite clear in how God marks time.