NAME
Date::Easter - Calculates Easter for any given year
SYNOPSIS
use Date::Easter;
($month, $day) = julian_easter(1752);
($month, $day) = easter(1753);
($month, $day) = gregorian_easter(1753);
($month, $day) = orthodox_easter(1823);
DESCRIPTION
Calculates Easter for a given year.
easter() is simply an alias to gregorian_easter(), since that's what
almost every country in the world currently uses.
Date::Easter provides the following functions:
julian_easter
( $month, $day ) = julian_easter( $year );
Returns the month and day of easter in the given year, in the Julian
calendar.
gregorian_easter
( $month, $day ) = gregorian_easter( $year );
Returns the month and day of easter in the given year, in the Gregorian
calendar, which is what most of the world uses.
easter
( $month, $day ) = easter( $year );
Returns the month and day of easter in the given year, in the Gregorian
calendar, which is what most of the world uses.
orthodox_easter
( $month, $day ) = orthodox_easter( $year );
Returns the month and day of easter in the given year, in the Orthodox
calendar.
From code by Pascalis Ligdas, based on original code by Apostolos
Syropoulos
AUTHOR
Rich Bowen <
[email protected]>
To Do
The use of localtime and timelocal locks us into the epoch, which is a
rather silly limitation. Need to move to Date::DayOfWeek or other module
to calculate the day of the week. This should immediately make the
module usable back to the beginning of celebration of Easter.
Other Comments
Note that Date::Manip also has code to do this, and you should
probably use that module instead. This module was written as an
academic exercise, since I an intrigued by calendrical calculations.
On the other hand, Date::Manip is huge, so you might want to use
this for that consideration. YMMV.
See also
http://www.pauahtun.org/CalendarFAQ/cal/node3.html for more
details on calculating Easter.
And many thanks to Simon Cozens who provided me with the code for the
orthodox_easter function.
The tests are taken from a table at
http://www.chariot.net.au/~gmarts/eastcalc.htm
The script 'easter' is just a simple way to find out when easter falls
in a given year. Type 'easter' to find easter for this year, and 'easter
1983' to find when easter falls in 1983.
