Date - Get day of week #X

[w1ww]

Hello,

 

Imagine that I want to know what will be the date on the Thursday of week #27 of an year?

 

For example, now is week #27, year 2008 and the date on Thursday was 03-07-2008 (dd-mm-yyyy).

 

How can I do that?

 

Thanks in advance,

Tiago

[Barand]

find thursday of first week, add 26*7 days

<?php
$wkNo = 27;
$offset = ($wkNo - 1)*7;
$date = mktime(0,0,0,1,1);
$firstThu = strtotime('next thursday', $date);
$thursOfWk = strtotime("+$offset days", $firstThu);

echo date ('d-M-Y', $thursOfWk);         // --> 03-Jul-2008
?>