The %e and %a are just formatting strings. Read perldoc Tk::Month to see how to change it. To get rid of the anonymous sub, it's simple, try this. I showed how to see what is passed to the sub. If this dosn't answer your question, be more specific in what you need to do.

#!/usr/bin/perl
use warnings;
use strict;
use Tk;
use Tk::Month;

my $mw = MainWindow->new();

my $month = "November";
my $year = "2006";
my $m = $mw->Month(
    -printformat   => '%a %e',
    -includeall    => 0,
    -month         => $month,
    -year          => $year,

    -command       => \&mysub
);
$m->pack;

MainLoop;

sub mysub {
        print scalar @_,"\n";
        print $_[0],"\n";
        print $_[1],"\n";
        print @{$_[1]},"\n";
       
        my ($ym, $wd) = @_;
        my ($month, $year) = split( /\s+/ , $ym );
        my ($wday, $date)  = split( /\s+/ , $wd->[0] );
        print "$wday, $month $date $year\n";
    }
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