gistfile1.sh

#!/bin/sh

echo ''

date "+%Y-%m-%d %H:%M:%S"
echo ''

cal
echo ''

perl -e 'my @lt = localtime();
my $month = $lt[4]+1;
my $year = $lt[5]+1900;

if ($month == 12) {
    $month = 1;
    $year += 1;
} else {
    $month++;
}

system "cal $month $year"; '
echo ''