Description:
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The strtotime() function doesn't except the date format mm-dd-yyyy. I does however except dd-mm-yyyy. This is in version 5.2.5.  In version 4.4.4 it does except the format of mm-dd-yyyy.

Reproduce code:
---------------
<?php
$one_day = 60 * 60 * 24;

for($i=0; $i < 365; $i++)
{
	$new_day = $one_day * $i;
	$new_date = time() + $new_day;
	$fdate = date("m-d-Y", $new_date);
	
	echo "<br>";
	echo "Next day: " . $fdate . "<br>";
	echo "StrtoTime: " . strtotime($fdate);
	echo "<br>";
}
?>



Expected result:
----------------
All the days should output the correct date in the format of mm-dd-yyyy and the strtotime should all output.



Actual result:
--------------
strtotime stops outputting on the 13th day and starts again on the 1st of the following month.

This tells me that it only excepts dd-mm-yyyy.