$now = time;
$hour = (localtime $now)[2];
$now += (12 - $hour)*60*60; # offset to noon-hour so DST doesn't fry us
$dow = (localtime $now)[6];
$now += (($dow < 4 ? -2 : 5) - $dow)*24*60*60;
($y, $m, $d) = (localtime $now)[5,4,3];
$file = sprintf "%d_%d_%d.html", $m+1, $d, $y+1900;