Date::Simple （日付のみだが扱い易い）
use Date::Simple qw/date/;
作成
my $today = Date::Simple->today;
my $date1 = Date::Simple->new('2000-01-01');
my $date2 = Date::Simple->new( 2000, 1, 1 );
my $date3 = date('2000-01-01');
my $undef = Date::Simple->new( 2000, 13, 32 );
表示
say $date->format('%Y/%m/%d');
say $date->year;
say $date->month;
say $date->day;
say $date->day_of_week; # 0:日 ... 6:土
加算減算
my $tomorrow = Date::Simple->today + 1;
say date(2000-01-01) - date('1999-01-01'); # 365
比較
if ( $date == "2000-01-01" ) { };
if ( $date > [ 2000, 1, 1 ] ) { };
my @sorted = sort { $a <=> $b }
(
date( [ 2000, 1, 3 ] ),
date( [ 2000, 1, 1 ] ),
date( [ 2000, 1, 2 ] )
);
参考
http://search.cpan.org/perldoc?Date::Simple
