NAME

    DateTime::Format::PGN - a Perl module for parsing and formatting date
    fields in chess game databases in PGN format

VERSION

    version 1.01

SYNOPSIS

        use DateTime::Format::PGN;
     
        my $f = DateTime::Format::PGN->new();
        my $dt = $f->parse_datetime( '2004.04.23' );
     
        # 2004.04.23
        print $f->format_datetime( $dt );
        
        # return a DateTime::Incomplete object:
        my $fi = DateTime::Format::PGN->new( { use_incomplete => 1} );
        my $dti = $fi->parse_datetime( '2004.??.??' );
        
        # 2004.??.??
        print $fi->format_datetime( $dti );

METHODS

 new(%options)

    Options are Boolean use_incomplete (default 0) and Boolean fix_errors
    (default 0).

        my $f = DateTime::Format::PGN->new( { fix_errors => 1, use_incomplete => 1 } );

    PGN allows for incomplete dates while DateTime does not. All missing
    date values in DateTime default to 1. So PGN ????.??.?? becomes
    0001.01.01 with DateTime. If use_incomplete => 1, a
    DateTime::Incomplete object is used instead where missing values are
    undef.

    I observed a lot of mistaken date formats in PGN databases downloaded
    from the internet. If fix_errors => 1, an attempt is made to parse the
    date anyway.

 parse_datetime($string)

    Returns a DateTime object or a DateTime::Incomplete object if option
    use_incomplete => 1. Since the first recorded chess game was played
    1485, years with a leading 0 are handled as errors.

 format_datetime($datetime)

    Given a DateTime object, this methods returns a PGN date string. If the
    date is incomplete, use a DateTime::Incomplete object (the
    use_incomplete option does not affect the formatting here).

Source

    PGN spec
    <https://web.archive.org/web/20160830115945/https://www.chessclub.com/user/help/PGN-spec>
    by Steven J. Edwards.

See also

      * * Chess::PGN::Parse

      * * DateTime::Incomplete

      * * https://github.com/houseabsolute/DateTime.pm/wiki

AUTHOR

    Ingram Braun <carlorff1@gmail.com>

COPYRIGHT AND LICENSE

    This software is copyright (c) 2016–2026 by Ingram Braun.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.

POD ERRORS

    Hey! The above document had some coding errors, which are explained
    below:

    Around line 66:

      '=item' outside of any '=over'

