use Modern::Perl;
use CGI qw ( -utf8 );
-use Date::Calc qw(Today Day_of_Year Week_of_Year Day_of_Week Days_in_Year Delta_Days Add_Delta_Days Add_Delta_YM);
-use C4::Auth;
-use C4::Output;
-use C4::Serials;
+use Date::Calc qw( Add_Delta_Days Add_Delta_YM Day_of_Week Delta_Days );
+use C4::Auth qw( get_template_and_user );
+use C4::Output qw( output_html_with_http_headers );
+use C4::Serials qw( GetSubscription GetFictiveIssueNumber GetSeq GetSubscriptionIrregularities GetNextDate GetNextSeq );
use C4::Serials::Frequency;
-use Koha::DateUtils;
+use Koha::DateUtils qw( dt_from_string output_pref );
my $input = CGI->new;
my ($template, $loggedinuser, $cookie, $flags) = get_template_and_user( {