This is one of the worst distortions of the Bible there is and is a bad case of reading something into the Bible which is not supported by the text.
In Genesis 1 where day is preceded by an ordinal number it means a 24 hour day as we understand it.
“In Genesis 1 where day is preceded by an ordinal number it means a 24 hour day as we understand it.”
Really?
Perhaps you can provide a specific source or quote?