Ticket #30845: 30845.patch

src/wp-includes/date.php

@@ -336 +336 @@
                 );
 
                 // Weeks per year.
-                if ( array_key_exists( 'year', $date_query ) ) {
-                        // If we have a specific year, use it to calculate number of weeks.
-                        $date = new DateTime();
-                        $date->setISODate( $date_query['year'], 53 );
-                        $week_count = $date->format( "W" ) === "53" ? 53 : 52;
-
-                } else {
-                        // Otherwise set the week-count to a maximum of 53.
-                        $week_count = 53;
-                }
-
+                $week_count = (array_key_exists('year', $date_query) ? date('W',mktime(0,0,0,12,28,$date_query['year'])) : 53);
                 $min_max_checks['week'] = array(
                         'min' => 1,
                         'max' => $week_count