23:26:18 on 05/21/2016 looks like current format for your ladder now.
$Date = date('m/d/Y');
So $Data is already formatted correctly.
$Clock = date("H:i:s");
http://php.net/manual/en/function.date.php$YOURTIME&DATEVARAIBLE
$Date = date('m/d/Y');
$Clock = date("H:i:s"); //if you want clock....
$CleanDate = explode("/", $Date);
$Month = $CleanDate[0];
$Day = $CleanDate[1];
$Year = $CleanDate[2];
Now parse your date from your variable like above. Then you can do
$LastPlayed = $Day - $Day2
if ($LastPlayed > 19)
echo "DEMOTE HERE"
I don't know php and just read and wrote it idk if it works didn't test. You would obviously Get day from your variable and make $day2 or whatever.