public function posts_by_day() {
    global  $json_api;
    $oldest = get_posts(array(
        'orberby' => 'date',
        'order' => 'ASC',
        'posts_per_page' => 1,
        'caller_get_posts' => 1
    ));
   
    $years = array_reverse(range(mysql2date('ISO 8601', $oldest[0]->post_date), date('ISO 8601', current_time('timestamp'))));
 
    foreach ($years as $year) {
        $year_posts = get_posts(array(
            'year' => $year,
             'post_type'=> array( 'post', 'imported_content' ),

            'order' => 'ASC',
            'orderby' => 'post_date',
            'posts_per_page' => -1
        ));
         foreach ($year_posts as $year_post) {
    return array(
    
  			"posts" =>  $year_posts
		);
	   }
	}
  }