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<?
//works only from 2001-2049, needs a modulo function, e.g. from bcmath or something like that:
//function mod($n,$d){return($n-$d*intval($n/$d));}
//eastersunday(2003) delivers for the 20th. this is the 20th of april.
//not perfect and complete but quick and dirty, often needed in database calculus.
function eastersunday($year){
$a=mod($year,19);
$b=mod($year,4);
$c=mod($year,7);
$temp=19*$a+24;
$d=mod($temp,30);
$temp=2*$b+4*$c+6*$d+5;
$e=mod($temp,7);
return($d+$e-9);
}
?> |
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