I modified this so heavily to use it that I didn't run into that problem (though I haven't finished debugging so maybe I did.)

I'll look more closely at this when I get a chance, but I appreciate your comment.

Cheers,

Rob

$fystartdate = strtotime($fyStart.$inputyear);
$fyenddate = strtotime($fyEnd.$inputyear);

should be:
$fystartdate = strtotime($fyStart.'/'.$inputyear);
$fyenddate = strtotime($fyEnd.'/'.$inputyear);

And
if($date < $fyenddate){

should be:
if($date <= $fyenddate){