Well if you are using a MySQL Database, they do have a function that outputs it into a readable format such as month/day/year and many other types of formats.
Otherwise, (since I am unfamiliar with other types of databases) You can convert the database date or datetime entries by using the strtotime() function. You can find the write up on that function here -
http://www.php.net/manual/en/function.strtotime.php