DateTime::Event::Chinese - DateTime Extension for Calculating Important Chinese Dates
use DateTime::Event::Chinese qw(:all); my $new_moon = chinese_new_years(); my $dt0 = DateTime->new(...); my $next_new_year = $new_year->next($dt0); my $prev_new_year = $new_year->previous($dt0); my $dt1 = DateTime->new(...); my $dt2 = DateTime->new(...); my $span = DateTime::Span->new(start => $dt1, end => $dt2); my $set = $new_year->intersection($span); my $iter = $set->iterator(); while (my $dt = $iter->next) { print $dt->datetime, "\n"; } my $new_year = chinese_new_year_for_sui($dt); my $new_year = chinese_new_year_for_gregorian_year($dt); my $new_year = chinese_new_year_after($dt); my $new_year = chinese_new_year_before($dt);
This modules implements the algorithm described in "Calendrical Calculations" to compute some important Chinese dates, such as date of new year and other holidays (Currently only new years can be calculated).
Returns a DateTime::Set that generates Chinese new years.
Returns the DateTime object representing the Chinese New Year for the "sui" (the period between two winter solstices) of the given date.
my $dt = chinese_new_year_for_sui($dt0);
Returns the DateTime object representing the Chinese New Year for the given gregorian year.
Returns a DateTime object representing the next Chinese New Year relative to the given datetime argument.
my $next_new_year = chinese_new_year_after($dt0);
This is the function that is internally used by new_year()->next().
Returns a DateTime object representing the previous Chinese New Year relative to the given datetime argument.
my $prev_new_year = chinese_new_year_beore($dt0);
This is the function that is internally used by new_year()->previous().
Daisuke Maki <daisuke@endeworks.jp>
<daisuke@endeworks.jp>
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
See http://www.perl.com/perl/misc/Artistic.html
[1] Edward M. Reingold, Nachum Dershowitz "Calendrical Calculations (Millenium Edition)", 2nd ed. Cambridge University Press, Cambridge, UK 2002
DateTime DateTime::Set DateTime::Astro DateTime::Event::SolarTerm
To install DateTime::Event::Chinese, copy and paste the appropriate command in to your terminal.
cpanm
cpanm DateTime::Event::Chinese
CPAN shell
perl -MCPAN -e shell install DateTime::Event::Chinese
For more information on module installation, please visit the detailed CPAN module installation guide.