package My::Date::Handler;

  use My::Date;

  sub new {
      my ($class, $cgi) = @_;
      my $month = $cgi->raw_param('month');
      my $day   = $cgi->raw_param('day');
      my $year  = $cgi->raw_param('year');
      return My::Date->new(
        month => $month,
        day   => $day,
        year  => $year,
      );
  }

  1;

##</code><code>##

  use Class::CGI
    handlers => {
      date => 'My::Date::Handler',
    };

  my $cgi  = Class::CGI->new;
  my $date = $cgi->param('date');
  my $day  = $date->day;