note 86275 added to function.date

Hi ! I've had a specific need to find out  if a  day is the day when a country  switch to winter/spring times , aka loosing one hour or getting one hour compared to the real time .. This works in europe , but i don't know about other regulations or countries , so be warned. The switch to "spring time" is always on the last saturday of march. The switch to winter time is always last saturday of october. Hope it helps ! 

use it like this :
if(checkSwitchToWinterTime('20081025'){
 echo 'today we switch to winter time' ;
}

function checkSwitchToWinterTime($day){
    //day is yyyymmdd
    $y =substr($day,0,4);
    $m = substr($day,4,2);
    $d = substr($day,6,2);
    //  if it is a saturday of october, check if it's the last one
    if(date("D-m", mktime(0, 0, 0, $m, $d, $y))=="Sat-10"){ ;
        if((date("m", mktime(0, 0, 0, $m, $d, $y))) !=  (date("m", mktime(0, 0, 0, $m, $d+7, $y)))) {
            return true;
        }
        return;
    }
    return;

}
function checkSwitchToSpringTime($day){
    //day is yyyymmdd
    $y =substr($day,0,4);
    $m = substr($day,4,2);
    $d = substr($day,6,2);
    //  if it is a saturday of march, check if it's the last one
    if(date("D-m", mktime(0, 0, 0, $m, $d, $y))=="Sat-03"){ ;
        if((date("m", mktime(0, 0, 0, $m, $d, $y))) !=  (date("m", mktime(0, 0, 0, $m, $d+7, $y)))) {
            return true;
        }
        return;
    }
    return;

}
----
Server IP: 213.246.51.26
Probable Submitter: 195.248.4.144
----
Manual Page -- http://www.php.net/manual/en/function.date.php
Edit        -- https://master.php.net/note/edit/86275
Del: integrated  -- https://master.php.net/note/delete/86275/integrated
Del: useless     -- https://master.php.net/note/delete/86275/useless
Del: bad code    -- https://master.php.net/note/delete/86275/bad+code
Del: spam        -- https://master.php.net/note/delete/86275/spam
Del: non-english -- https://master.php.net/note/delete/86275/non-english
Del: in docs     -- https://master.php.net/note/delete/86275/in+docs
Del: other reasons-- https://master.php.net/note/delete/86275
Reject      -- https://master.php.net/note/reject/86275
Search      -- https://master.php.net/manage/user-notes.php