Well I have yet to hear a scripture to support an old earth model. Do you have to use websites? Show me simple passages that support an old earth. BTW, Yes even a child can understand God created it all in 6 days.
The biblical evidence they use comes from various places, they also argue they have yet to hear the biblical support for a 24 hour period. I also heard regarding the Sabbath day of "rest" as clearly not a 24 hour period as God is "still" in His day of rest in Heb 4. Another is the problem of what activity can be done on a day, for example they say the events on day 6 do not seem to fit a 24 hour period. Day 3 the land produced vegetation which would not fit a 24 hour period under the natural process of growth.
The Hebrew phrase puts evening and morning and day as one statement. So what the explanation for evening and morning and day is that during the "set period of time" (yom) had an unnumbered amount of days for which all had both evening and morning.
Anway that's just to show that when you say there is no biblical support you obviously plant your flag and make the assumption that 24 hour periods are the ONLY interpretation, when the old earthers would find that 24 hour periods in Gen 1 to be irrelevant since there is no reason to assume that MUST be the correct interpretation.
Darren