It'd be easier to help you with a code example.
But from what I can tell from you question you have a list of meeting dates and you only want to show the next date.
So if you aren't storing your meeting dates in a database I suggest that you look into it. Other than that I'm going to assume that you have a list of dates somewhere and that you can get to this list in your code (I'm going to assume it's in an array). So all you'd need to do is something like this:
$meetingDates = array('01/01/03', '01/15/03', '02/02/03', '03/14/03'); //you get the idea.
$systemDate = date('m/d/y');
foreach ($meetingDates as $date) {
if ($date >= $systemDate) {
echo "Next Meeting: " . $date;
break;
}
}