There are two ways to go about this, either we:
1. Discuss the overwhelming evidence that proves evolution is true, thus invalidating the claim that the earth was created in an extremely short timespan
2. Discuss the overwhelming evidence that proves the bible is not a text that can be taken word for word literally as truth, which should allow the ideas of faith and evolution to cohere and form one belief for you (as it has for me).
Since option 2 is how I feel right now, try investigating the original hebrew text. The word in hebrew is not 'day' but 'yowm' which could be translated into 'day' 'era' 'age' or 'time'. Thus, it took God 6 "eras" or 6 "ages" to create the earth and on the 7th, he rested.
This site, while obviously biased, discusses this point: http://www.accuracyingenesis.com/day.html
Another, which is obviously a faith-based site, reiterating the possible usage as "time period": http://www.biblestudytools.com/Lexic...17&version=kjv