A timestamp is the number of seconds since 1-1-1970, so you can create a timestamp for the beginning of the date and the end of the date, and select all recors where the timestamp falls between these two values.
For ex, all dates in the first day of 1-1-1970: SELECT FROM table WHERE stamp_field>0 and stampdfield < 2460*60
A forum, a FAQ, email notification, what else do you need?