Alexandr Ciornii > DateTime-Format-Epoch > DateTime::Format::Epoch::JD

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Module Version: 0.13   Source  

NAME ^

DateTime::Format::Epoch::JD - Convert DateTimes to/from Julian Days

SYNOPSIS ^

  use DateTime::Format::Epoch::JD;

  my $dt = DateTime::Format::Epoch::JD->parse_datetime( 2453244.5 );
   # 2004-08-27T00:00:00
  DateTime::Format::Epoch::JD->format_datetime($dt);
   # 2453244.5

  my $formatter = DateTime::Format::Epoch::JD->new();
  my $dt2 = $formatter->parse_datetime( 2453244.5 );
   # 2004-08-27T00:00:00
  $formatter->format_datetime($dt2);
   # 2453244.5

DESCRIPTION ^

This module can convert a DateTime object (or any object that can be converted to a DateTime object) to the Julian Day number. This is the number of days since noon U.T.C. on January 1, 4713 B.C. (Julian calendar).

This time scale was originally proposed by John Herschel, and is often used in astronomical calculations.

Similar modules are:

METHODS ^

Most of the methods are the same as those in DateTime::Format::Epoch. The only difference is the constructor.

SUPPORT ^

Support for this module is provided via the datetime@perl.org email list. See http://lists.perl.org/ for more details.

AUTHOR ^

Eugene van der Pijll <pijll@gmx.net>

COPYRIGHT ^

Copyright (c) 2004 Eugene van der Pijll. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO ^

DateTime

datetime@perl.org mailing list

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