<?php
for ($y = 0; $y <= 2050; $y++) {
	$m = 12;
	$d = 31;
	$w = date("W", mktime(1, 1, 1, $m, $d, $y));
	if ($w > 52) { echo "$y-$m-$d -> week: $w <br>"; }
}
?>

Will output:
4-12-31 -> week: 53 
9-12-31 -> week: 53 
15-12-31 -> week: 53 
20-12-31 -> week: 53 
26-12-31 -> week: 53 
32-12-31 -> week: 53 
37-12-31 -> week: 53 
70-12-31 -> week: 53 
76-12-31 -> week: 53 
81-12-31 -> week: 53 
87-12-31 -> week: 53 
92-12-31 -> week: 53 
98-12-31 -> week: 53 
104-12-31 -> week: 53 
109-12-31 -> week: 53 
115-12-31 -> week: 53 
120-12-31 -> week: 53 
126-12-31 -> week: 53 
132-12-31 -> week: 53 
137-12-31 -> week: 53 
1970-12-31 -> week: 53 
1976-12-31 -> week: 53 
1981-12-31 -> week: 53 
1987-12-31 -> week: 53 
1992-12-31 -> week: 53 
1998-12-31 -> week: 53 
2004-12-31 -> week: 53 
2009-12-31 -> week: 53 
2015-12-31 -> week: 53 
2020-12-31 -> week: 53 
2026-12-31 -> week: 53 
2032-12-31 -> week: 53 
2037-12-31 -> week: 53 

Which is wrong because it should utput week: 1 :)
I think this information should be enough.
Good Luck :)

//Christian.