The Hebrew word “Yom” has some designations that are not at all indicative or exclusive to a meaning of a 24 hour period.
But then, you might have have to read a bit (or a whole lot) more in order to grasp that concept.
Please point out the Biblical context, in which Adam's Creation was stretched out hundreds of millions of years, as is necessary, in order to fit evolution into Biblical Creation.
Seriously. I'm very interested in seeing you do so.
I provided a link to explain the various definitions and context in detail. I guess no one read it.