#!/usr/bin/perl
$servertime     = localtime (time);
$x              = 0;
$Day            = "Wed";
$Month          = "Dec";
$Date           = "5";
$Time           = "10:15:30";
$Year           = "2007";
$AudioFileName  = "04 - Dido - Marys In India - EMG - www.elitemusic.e
+s.vg.mp3";
$Player         = "xmms";

print ("\r\n \r\n \r\n");
print ("--------------------------------------------------------------
+--------------- \r\n");
print ("Welcome To Dans Perl Alarm Clock For Linux\r\n");
print ("Created by Dan Gibas - http://www.hygen.net\r\n");
print ("--------------------------------------------------------------
+--------------- \r\n");
print ("\r\n \r\n \r\n");
print ("Hit ENTER to continue setup...\r\n");
$Begin = <STDIN>;

print ("\r\n \r\n \r\n");
print ("Enter Alarm Day:\r\n\r\n");
print ("(Choose a number from 1 to 7)\r\n");
print ("1 = Mon\r\n");
print ("2 = Tue\r\n");
print ("3 = Wed\r\n");
print ("4 = Thu\r\n");
print ("5 = Fri\r\n");
print ("6 = Sat\r\n");
print ("7 = Sun\r\n");
$Day = <STDIN>;

print ("Enter Alarm Month:\r\n\r\n");
print ("(Choose a number from 1 to 12)\r\n");
print ("1 = Jan\r\n");
print ("2 = Feb\r\n");
print ("3 = Mar\r\n");
print ("4 = Apr\r\n");
print ("5 = May\r\n");
print ("6 = Jun\r\n");
print ("7 = Jul\r\n");
print ("8 = Aug\r\n");
print ("9 = Sep\r\n");
print ("10 = Oct\r\n");
print ("11 = Nov\r\n");
print ("12 = Dec\r\n");
$Month = <STDIN>;









if ($Day == 1){
$Day = "Mon";
}
if ($Day == 2){
$Day = "Tue";
}
if ($Day == 3){
$Day = "Wed";
}
if ($Day == 4){
$Day = "Thu";
}
if ($Day == 5){
$Day = "Fri";
}
if ($Day == 6){
$Day = "Sat";
}
if ($Day == 7){
$Day = "Sun";
}

if ($Month == 1){
$Month = "Jan";
}
if ($Month == 2){
$Month = "Feb";
}
if ($Month == 3){
$Month = "Mar";
}
if ($Month == 4){
$Month = "Apr";
}
if ($Month == 5){
$Month = "May";
}
if ($Month == 6){
$Month = "Jun";
}
if ($Month == 7){
$Month = "Jul";
}
if ($Month == 8){
$Month = "Aug";
}
if ($Month == 9){
$Month = "Sep";
}
if ($Month == 10){
$Month = "Oct";
}
if ($Month == 11){
$Month = "Nov";
}
if ($Month == 12){
$Month = "Dec";
}

print ("\r\n \r\n \r\n");
print ("--------------------------------------------------------------
+--------------- \r\n");
print ("Alarm activated! \r\n");
print ("Alarm will go off at:  $Day $Month  $Date $Time $Year \r\n");
print ("Alarm will play:  $AudioFileName \r\n");
print ("[^c to quit] \r\n");
print ("--------------------------------------------------------------
+--------------- \r\n");



while ($x < 10) {
$servertime = localtime (time);
  if ($servertime eq "$Day $Month  $Date $Time $Year"){
  $x = 100;
  exec ("$Player \"$AudioFileName\"");
  }
}
[download]

It uses a bit too much CPU but works...

more info here - http://www.hygen.net/blog/

Edit: g0n - code tags