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easter_days
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easter_days

Name

easter_days — Gets the number of days after the vernal equinox on which Easter falls in the specified year.

Synopsis

int easter_days([year]); int year (optional): Year for which to calculate Easter days

Returns

Number of days

Description

easter_days() calculates the number of days after the vernal equinox (March 21) on which Easter falls. If no year argument is provided, the current year is assumed.

Note easter_days() calculates this date as reckoned by the Vatican.

Note

Wondering why the vernal equinox has anything to do with the celebration of Easter? Do a search on the web for the terms Easter and Nicae.

Version

PHP Version: 3.0.9+, 4+

Example

Example 68. Find out when Easter falls for all years from 2038 to 2100

<table cellpadding="2" cellspacing="0">
<?php
$format = '<tr bgcolor="%s"><td>%s</td><td align="right">%2s</td><td>%d</td></tr>';

for ($year = 2038; $year <= 2100; ++$year) {
    $easter_days = easter_days ($year);
    
    $bgcolor = ($year % 2) ? '#FFFFFF' : '#EFEFEF';

    if ($easter_days < 11)
        printf ($format, $bgcolor, 'March', ($easter_days + 21), $year);
    else
        printf ($format, $bgcolor, 'April', ($easter_days - 10), $year);
}
?>
</table>

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