C.H. Kang
and 1 contributors

NAME

Date::Korean - Conversion between Korean solar / lunisolar date.

SYNOPSIS

    use Date::Korean;

    # convert solar to lunisolar date
    my ($ly, $lm, $ld, $leap) = sol2lun(2008, 10, 10);

    # convert lunisolar to solar date
    my ($sy, $sm, $sd) = lun2sol(2008, 9, 12, 0);

    # get ganzi in chinese
    my ($saecha, $wolgun, $iljin) = get_ganzi(2008, 9, 12, 0);

    # get ganzi in korean
    my ($saecha, $wolgun, $iljin) = get_ganzi_ko(2008, 9, 12, 0);

DESCRIPTION

The traditional korean lunisolar calendar is based on the chinese calendar. This module handles conversion between Korean solar and lunisolar date.

FUNCTIONS

sol2lun
  my ($ly, $lm, $ld, $leap) = sol2lun(2008, 10, 10);

Convert solar to lunisolar date. This function takes solar year, month, day arguements and returns lunisolar year, month, day and leap flag( 1 if month is leap month, or 0 if not )

lun2sol
 my ($sy, $sm, $sd) = lun2sol(2008, 9, 12, 0);

Convert lunisolar to solar date. This function takes lunisolar year, month, day, leap flag and returns solar year, month, day.

get_ganzi
 my ($saecha, $wolgun, $iljin) = get_ganzi(2008, 9, 12, 0);
 binmode STDOUT, ':encoding(UTF-8)';
 print "$saecha $wolgun $iljin\n";

output

 戊子 壬戌 癸未

Get ganzi (sexagenary cycle - 干支) of year(歲次), month(月建), day(日辰) in chinese. This function takes lunisolar year, month, day, leap flag.

get_ganzi_ko
 my ($saecha, $wolgun, $iljin) = get_ganzi_ko(2008, 9, 12, 0);
 binmode STDOUT, ':encoding(UTF-8)';
 print "$saecha $wolgun $iljin\n";

output

 무자 임술 계미

Get ganzi (sexagenary cycle - 간지) of year(세차), month(월건), day(일진) in korean. This function takes lunisolar year, month, day, leap flag.

CAVEATS

  • Conversion between solar and lunisolar date is very difficult because it based on complicated astronomical calculation. Parameters of the conversion equation are sometimes not constant and should be obtained from astronomical observation. So I used precalculated conversion table because the calculation result does not fully gurantee the accuracy of it.

  • Conversion table was striped and generated from solar <-> lunisolar conversion service on Korea Astronomy & Space Science Institute ( http://www.kao.re.kr/ ). Currently supported date range is from solar 1391-02-05 ( lunisolar 1391-01-01 ) to 2050-12-31 ( lunisolar 2050-11-18 ).

AUTHOR

C.H. Kang <chahkang_AT_gmail.com>

COPYRIGHT AND LICENSE

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

SEE ALSO

DateTime, DateTime::Calendar::Julian, Date::ISO8601