I hear ya on that verse. But I don't see the bible stating morning and evening in Genesis to mean anything other than a 24 hour period. Hebrew word, yom. I do understand a lot of ways people can see it differently, and 2 Peter adds to it for sure.
Because we even see in Ezekiel 4:6, a day can also mean a year in bible prophecy.
Love the bible man, there's always so much to learn and look into!