# cron runs if dom OR dow
                # i want dom AND dow, so I can do "every second and fourth friday"
                # thus i will create two objects and iterate untill they match
                my $cronDom = new Schedule::Cron::Events( "$min $hour $dom $month *    without_dom", Date => [ ( localtime(time()) )[0..5] ] );
                my $cronDow = new Schedule::Cron::Events( "$min $hour *    $month $dow without_dom", Date => [ ( localtime(time()) )[0..5] ] );
                my ($sec, $min, $hour, $day, $month, $year);

                # find the prevoius execution time
                ($sec, $min, $hour, $day, $month, $year) = $cronDom->previousEvent; $month+=1; $year+=1900; $domstamp = $day + 30*$month + 30*12*$year;
                ($sec, $min, $hour, $day, $month, $year) = $cronDow->previousEvent; $month+=1; $year+=1900; $dowstamp = $day + 30*$month + 30*12*$year;
                while( $domstamp > $dowstamp ) {  # decrease dom
                        alert("decreasing dom");
                        ($sec, $min, $hour, $day, $month, $year) = $cronDom->previousEvent; $month+=1; $year+=1900; $domstamp = $day + 30*$month + 30*12*$year;
                }
                while( $dowstamp > $domstamp ) {  # decrease dow
                        ($sec, $min, $hour, $day, $month, $year) = $cronDow->previousEvent; $month+=1; $year+=1900; $dowstamp = $day + 30*$month + 30*12*$year;
                        alert("decreasing dow");
                }
                # match!
                my $lastTime = "$year-$month-$day $hour:$min:$sec";

                # find the next execution time
                ($sec, $min, $hour, $day, $month, $year) = $cronDom->nextEvent; $month+=1; $year+=1900; $domstamp = $day + 30*$month + 30*12*$year;
                ($sec, $min, $hour, $day, $month, $year) = $cronDow->nextEvent; $month+=1; $year+=1900; $dowstamp = $day + 30*$month + 30*12*$year;
                ($sec, $min, $hour, $day, $month, $year) = $cronDom->nextEvent; $month+=1; $year+=1900; $domstamp = $day + 30*$month + 30*12*$year;
                ($sec, $min, $hour, $day, $month, $year) = $cronDow->nextEvent; $month+=1; $year+=1900; $dowstamp = $day + 30*$month + 30*12*$year;
                while( $domstamp < $dowstamp ) {  # increase dom
                        alert("increasing dom");
                        ($sec, $min, $hour, $day, $month, $year) = $cronDom->nextEvent; $month+=1; $year+=1900; $domstamp = $day + 30*$month + 30*12*$year;
                }
                while( $dowstamp < $domstamp ) {  # increase dow
                        ($sec, $min, $hour, $day, $month, $year) = $cronDow->nextEvent; $month+=1; $year+=1900; $dowstamp = $day + 30*$month + 30*12*$year;
                        alert("increasing dow");
                }
                # match!
                my $thisTime = "$year-$month-$day $hour:$min:$sec";

                print "this time $lastTime -- next time $thisTime -- time between is just one select statement away.\n";