Hello, could add an additional attribute to which you already have, in class.ticket.php file found in the include folder, look at line 60 or so, or where get the variable $sql and end of the sentence add a date attribute, you selecione from the dates you want to the other.
I leave a link so you can see how to use the Between.
http://www.w3schools.com/sql/sql_between.asp(http://www.w3schools.com/sql/sql_between.asp)