function get_first_date_last_year($y=1) {
    return $this->mdate($this->dateFormat, mktime(0, 0, 0, 1, 1, $this->mdate("Y")-$y));
  }
function get_first_date_last_year($y=1) {
    return $this->mdate($this->dateFormat, mktime(0, 0, 0, 1, 1, $this->mdate("Y")-$y));
  }
function get_first_date_last_year ( $ y = 1 ) { return $ this -> mdate ( $ this -> dateFormat , mktime ( 0 , 0 , 0 , 1 , 1 , $ this -> mdate ( "Y" ) - $ y ) ) ; }
Return first date of last year
Return first date of last year