-
-       /**
-        * Compute eastern for selected year
-        *
-        * @param string $year The eastern year
-        *
-        * @return DateTime The eastern date
-        */
-       private function getEastern(string $year): \DateTime {
-               //Set static
-               static $data = null;
-
-               //Check if already computed
-               if (isset($data[$year])) {
-                       //Return computed eastern
-                       return $data[$year];
-               //Check if data is null
-               } elseif (is_null($data)) {
-                       //Init data array
-                       $data = [];
-               }
-
-               $d = (19 * ($year % 19) + 24) % 30;
-
-               $e = (2 * ($year % 4) + 4 * ($year % 7) + 6 * $d + 5) % 7;
-
-               $day = 22 + $d + $e;
-
-               $month = 3;
-
-               if ($day > 31) {
-                       $day = $d + $e - 9;
-                       $month = 4;
-               } elseif ($d == 29 && $e == 6) {
-                       $day = 10;
-                       $month = 4;
-               } elseif ($d == 28 && $e == 6) {
-                       $day = 18;
-                       $month = 4;
-               }
-
-               //Store eastern in data
-               return ($data[$year] = new \DateTime(sprintf('%04d-%02d-%02d', $year, $month, $day)));
-       }