\"01\",\"February\"=>\"02\",\"March\"=>\"03\",\"April\"=>\"04\",\"May\"=>\"05\",\"June\"=>\"06\",\"July\"=>\"
If you want to get the value of the select item use:
$month = $_POST['month'];
You question makes it uncertain for me if this is all within the same file or not. If this doesn't solve your problem, please let me know in the comments.