This is a very simple but usefull function to get the name og month from the number.

function monthName($mon){

        $mname = date( 'F', mktime(0, 0, 0, $mon) );
        return $mname;
}

to test this code try the following

echo 'Current Month:'.monthName(date("m"));
echo 'XMAS is on' .monthName(12);
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