The reason that the calendar is not displayed in admin/featured.php is that the few links are missing from the file. Need to add:
<link rel="stylesheet" type="text/css" href="includes/javascript/calendar.css">
<script language="Javascript" src="includes/javascript/calendarcode.js"></script>
just below:
require(DIR_WS_INCLUDES . 'template_top.php');
?>
Also, for the special prices to display in product listing on index, need to add the following code below to includes/modules/featured.php:
if (tep_not_null($featured_products['specials_new_products_price'])) {
$new_price = '<s>' . $currencies->display_price($featured_products['products_price'], tep_get_tax_rate($featured_products['products_tax_class_id'])) . '</s> ';
$new_price .= '<span class="productSpecialPrice">' . $currencies->display_price($featured_products['specials_new_products_price'], tep_get_tax_rate($featured_products['products_tax_class_id'])) . '</span>';
} else {
$new_price = $currencies->display_price($featured_products['products_price'], tep_get_tax_rate($featured_products['products_tax_class_id']));
}
Also, change in line from:
$featured_prods_content .= '<td width="33%" align="center" valign="top"><a href="' . tep_href_link(FILENAME_PRODUCT_INFO, 'products_id=' . $featured_products['products_id']) . '">' . tep_image(DIR_WS_IMAGES . $featured_products['products_image'], $featured_products['products_name'], SMALL_IMAGE_WIDTH, SMALL_IMAGE_HEIGHT) . '</a><br /><a href="' . tep_href_link(FILENAME_PRODUCT_INFO, 'products_id=' . $featured_products['products_id']) . '">' . $featured_products['products_name'] . '</a><br />' . $currencies->display_price($featured_products['products_price'], tep_get_tax_rate($featured_products['products_tax_class_id'])) . '</td>';
to this:
$featured_prods_content .= '<td width="33%" align="center" valign="top"><a href="' . tep_href_link(FILENAME_PRODUCT_INFO, 'products_id=' . $featured_products['products_id']) . '">' . tep_image(DIR_WS_IMAGES . $featured_products['products_image'], $featured_products['products_name'], SMALL_IMAGE_WIDTH, SMALL_IMAGE_HEIGHT) . '</a><br /><a href="' . tep_href_link(FILENAME_PRODUCT_INFO, 'products_id=' . $featured_products['products_id']) . '">' . $featured_products['products_name'] . '</a><br />' . $new_price . '</td>';
This worked for me, hope it works for you, too.