#!/usr/local/bin/perl

    use Date::Calc qw (Add_Delta_YMD Date_to_Days);
    
    # Parameter 1: start_date;
    # Parameter 2: end_date;
    
      @s_dt = split(/-/,$ARGV[0]);
      @e_dt = split(/-/,$ARGV[1]);
      
    # Calculate the begininning quarter for the loop
      
     if ($s_dt[1]/3 == int($s_dt[1]/3)) {
     
        $add_mon = 3*($s_dt[1]/3-1);
        
        $qtr = $s_dt[1]/3;
        
      } else {
      
        $add_mon = 3*int($s_dt[1]/3);
        
        $qtr = int($s_dt[1]/3)+1;
      }
      
      @x = Add_Delta_YMD($s_dt[0],1,1, 0,$add_mon,0);
      
      print "x is @x\n";
    
    # Calculate the ending quarter for the loop
    
     if ($e_dt[1]/3 == int($e_dt[1]/3)) {
     
        $eadd_mon = 3*($e_dt[1]/3);
        
      } else {
      
        $eadd_mon = 3*(int($e_dt[1]/3)+1);
      } 

      @y = Add_Delta_YMD($e_dt[0],1,1, 0,$eadd_mon,-1);
  
      print "y is @y\n";

      if ($e_dt[1] == $eadd_mon && $e_dt[2] == $y[2]) {
      
      @y = Add_Delta_YMD($e_dt[0],1,1, 0,$eadd_mon,-1);
      
      } else {
      
      @y = ($e_dt[0],$e_dt[1],$e_dt[2]);
      }
      
      print "y1 is @y\n";
    
    # Now loop for beginning qtr and ending qtr
      
      while (Date_to_Days(@x) < Date_to_Days(@y)) {
     
     printf("%4d-%02d-%02d\t%4d-%02d-%02d\t%sQ%01d\n",
               @x, Add_Delta_YMD(@x, 0,3,-1), substr($x[0],2,2), $qtr);

       @x = Add_Delta_YMD(@x, 0,3,0);

        #  roll over quarter to 1, beyond 4
        $qtr++;
        $qtr = $qtr > 4 ? 1 : $qtr;
      }