Custom Events Calendar (shows next month)

function custom_shortcode(){

	$d = new DateTime('NOW');
	$d->modify( 'next month' );
	$month = $d->format( 'm' );

	$y = new DateTime('NOW');
	$year = $d->format( 'yyyy' );

	echo do_shortcode('[events_calendar year="'.$year.'" month="'.$month.'" long_events=1 full=1]');
}
add_shortcode( 'custom_calendar', 'custom_shortcode' );