diff --git wp-includes/date.php wp-includes/date.php
index 2e903a2..5d7c4e3 100644
--- wp-includes/date.php
+++ wp-includes/date.php
@@ -510,7 +510,7 @@ class WP_Date_Query {
 				$column = 'post_date';
 			}
 
-			$known_columns = array(
+			$known_columns = apply_filters( 'date_query_known_columns', array(
 				$wpdb->posts => array(
 					'post_date',
 					'post_date_gmt',
@@ -524,7 +524,7 @@ class WP_Date_Query {
 				$wpdb->users => array(
 					'user_registered',
 				),
-			);
+			) );
 
 			// If it's a known column name, add the appropriate table prefix.
 			foreach ( $known_columns as $table_name => $table_columns ) {