get post order by date wordpress

orderpost

Place code into theme functions.php or package into a plugin.
/**
 * Sets up order post by date.
 *
 * @since  1.0.0
 */

 function theworld_alter_query ( $query ) 
{ 
    if  ( $query -> is_main_query ()  &&  ( $query -> is_home ()  || $query -> is_search ()  || $query -> is_archive ()  )   ) 
    { 
        $query -> set (  'orderby' ,  'date'  ); 
        $query -> set (  'order' ,  'desc'  ); 
    } 
} 
add_action (  'pre_get_posts' ,  'theworld_alter_query'  );