WordPress: Remove date ranges from post titles

gistfile1.php

<?php

/**
 * Remove date ranges from post titles
 *
 * @author ericpedia
 * @since  2014-08-26
 *
 */

add_filter( 'the_title', 'epi_remove_dates_from_charts' );

function epi_remove_dates_from_charts( $title ) {

	global $post;

	// $isChart = is_singular( array('chart', 'post') ); // no idea why this didn't work
	$isChart = in_array( $post->post_type, array('chart', 'post') );

	if ( ! $isChart ) return $title;

	$months = '((Jan(uary)?|Feb(ruary)?|Mar(ch)?|Apr(il)?|May|Jun(e)?|Jul(y)?|Aug(ust)?|Sep(t|tember)?|Oct(ober)?|Nov(ember)?|Dec(ember)?)\.?)';

	// @todo doesn't catch the years at the end of: "Change in real family income from business cycle peak years 1989, 2000, and"
	$filtered = preg_replace( '/,? ('.$months.'?[\s-–—]?\d+([-–— and]+'.$months.'?[\s-–—]?\d+)?( \(.*dollars.*\))?\*?$)/', '', $title );

	// To privately test you can uncomment this
	// if ( is_user_logged_in() ) {
	// 	return "$title<br>$filtered";
	// 	// return "$title<br>$filtered";
	// }

	return $filtered;
}