This should be doable in index.php.... if you look around line 170, you'll see something like this:
Text Formatted Code
if ($nrows > 0) {
for ($x = 1; $x <= $nrows; $x++) {
$A = DB_fetchArray($result);
if ($A['featured'] == 1) {
$feature = 'true';
} elseif (($x == 1) && ($_CONF['showfirstasfeatured'] == 1)) {
$feature = 'true';
$A['featured'] = 1;
}
$display .= COM_article($A,'y');
if ($A['featured'] == 1) {
$display .= PLG_showCenterblock (2, $page, $topic);
}
}
in this, you could add a check after the $A = DB_fetchArray($result) to see whether the date has changed, and if it has, add an extra line of text with the next date.
Cheers,
Euan.
-- Heather Engineering
-- No job too small