Mega Code Archive
Calculation of easterday and the holydays depended of easterday
<![CDATA[
<?php
/* goldnum: The Golden Number */
/* epact: Paschal Full Moon */
function easterday ($year) {
$goldnum = (int) ($year%19) + 1;
$century = (int) $year/100 + 1;
$greg_corr = (int) (3*$century)/4 - 12;
$clav_corr = (int) ($century - 16 - ($century-18)/25)/3;
$extra = (int) (5*$year)/4 - $greg_corr - 10;
$epact = (int) (11*$goldnum + 20 + $clav_corr - $greg_corr)%30;
if ($epact <= 0 ) $epact = $epact + 30;
if (($epact == 24 || $epact == 25) && $goldnum > 11) $epact = $epact + 1;
$day = 44 - $epact;
if ($day < 21) $day = $day + 30;
$day = $day + 7 - (($extra+$day)%7); $month = 3;
if ($day > 31) { $month = 4; $day = $day - 31; }
return mktime(8,0,0,$month,$day,$year);
}
$seconds_pr_day = 86400;
for ($i=1990; $i<=2010; $i++) {
$easter = easterday($i);
echo "Easterday: ";
echo date("Y-m-d", $easter);
echo " - Pentecost: ";
echo date("Y-m-d", $easter + (49*$seconds_pr_day));
echo "\n";
}
?>
]]>