Declination - Declination of the sun for each day of the year


  use Declination qw(declination);
  my $date = DateTime->new(day=>21, month=>3, year=>2010);
  my $declination       = declination($date, 'deg');

declination($date, [ $units])

Returns the declination of the sun on the given day of the year.


A DateTime object. Only the day and month are relevant.


The units to return, either 'rad' or 'deg'. This determines whether the result is returned as radians or degrees. If you are going to pass the result to trigonometric functions then radians are better. Default 'rad'.


Raphael Mankin, <rapmankin at>


Please report any bugs or feature requests to bug-datetime-event-jewish at, or through the web interface at I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.


You can find documentation for this module with the perldoc command.

    perldoc DateTime::Event::Jewish

You can also look for information at:



Copyright 2010 Raphael Mankin.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See for more information.