gistfile1.php

<?php

function eco_preprocess_node(&$variables, $hook) {
  $sub_date = t('@date', array('@date' => date("l, M jS, Y", $variables['created'])));
  $variables['submitted'] = "Submitted by " . $variables['name'] . " on " . $sub_date;

}

function eco_preprocess_comment(&$variables) {
  $sub_date = t('@date', array('@date' => date("l, M jS, Y", $variables['created'])));
  $variables['submitted'] = "Submitted by " . $variables['author'] . " on " . $sub_date;
}