Generally, high level languages have built-in date and time formatting, allowing you to present dates and times in virtually any manner you'd like. On the occasions that a language doesn't have such built-in support, it's fairly easy to write a method to do it for you. Going this route, as Jani's colleague did, is probably not the best way to go ...

try 
{
 cal.setTime(reservationTimestamp);
 cal.add(Calendar.HOUR, -2);
 Minute = cal.get(Calendar.MINUTE);
 Hour = cal.get(Calendar.HOUR);
 Day = cal.get(Calendar.DATE);
 Month = cal.get(Calendar.MONTH)+1;
 Year = cal.get(Calendar.YEAR);
 if (cal.get(Calendar.AM_PM) == 0) 
 {
  if (Hour == 0) { tempHour = "00"; }
  if (Hour == 1) { tempHour = "01"; }
  if (Hour == 2) { tempHour = "02"; }
  if (Hour == 3) { tempHour = "03"; }
  if (Hour == 4) { tempHour = "04"; }
  if (Hour == 5) { tempHour = "05"; }
  if (Hour == 6) { tempHour = "06"; }
  if (Hour == 7) { tempHour = "07"; }
  if (Hour == 8) { tempHour = "08"; }
  if (Hour == 9) { tempHour = "09"; }
  if (Hour == 10) { tempHour = "10"; }
  if (Hour == 11) { tempHour = "11"; }
 }
 if (cal.get(Calendar.AM_PM) == 1) 
 {
  if (Hour == 0) { tempHour = "12"; }
  if (Hour == 1) { tempHour = "13"; }
  if (Hour == 2) { tempHour = "14"; }
  if (Hour == 3) { tempHour = "15"; }
  if (Hour == 4) { tempHour = "16"; }
  if (Hour == 5) { tempHour = "17"; }
  if (Hour == 6) { tempHour = "18"; }
  if (Hour == 7) { tempHour = "19"; }
  if (Hour == 8) { tempHour = "20"; }
  if (Hour == 9) { tempHour = "21"; }
  if (Hour == 10) { tempHour = "22"; }
  if (Hour == 11) { tempHour = "23"; }
  if (Hour == 12) { tempHour = "00"; }
 }
 tempMinute = ""+Minute;
 if (Minute == 0) { tempMinute = "00"; }
 if (Minute == 1) { tempMinute = "01"; }
 if (Minute == 2) { tempMinute = "02"; }
 if (Minute == 3) { tempMinute = "03"; }
 if (Minute == 4) { tempMinute = "04"; }
 if (Minute == 5) { tempMinute = "05"; }
 if (Minute == 6) { tempMinute = "06"; }
 if (Minute == 7) { tempMinute = "07"; }
 if (Minute == 8) { tempMinute = "08"; }
 if (Minute == 9) { tempMinute = "09"; }
 if (Month == 1) { tempMonth = "1"; }
 if (Month == 2) { tempMonth = "2"; }
 if (Month == 3) { tempMonth = "3"; }
 if (Month == 4) { tempMonth = "4"; }
 if (Month == 5) { tempMonth = "5"; }
 if (Month == 6) { tempMonth = "6"; }
 if (Month == 7) { tempMonth = "7"; }
 if (Month == 8) { tempMonth = "8"; }
 if (Month == 9) { tempMonth = "9"; }

 insertTimeStamp = ""+Year+"."+Month+"."+Day+""+tempHour+":"+tempMinute;
} 
catch (Exception e) 
{
 insertTimeStamp = "N/A";
}
try 
{
 cal.setTime(cancellationTimestamp);
 cal.add(Calendar.HOUR, -2);
 Minute = cal.get(Calendar.MINUTE);
 Hour = cal.get(Calendar.HOUR);
 Day = cal.get(Calendar.DATE);
 Month = cal.get(Calendar.MONTH)+1;
 Year = cal.get(Calendar.YEAR);
 if (cal.get(Calendar.AM_PM) == 0) 
 {
  if (Hour == 0) { tempHour = "00"; }
  if (Hour == 1) { tempHour = "01"; }
  if (Hour == 2) { tempHour = "02"; }
  if (Hour == 3) { tempHour = "03"; }
  if (Hour == 4) { tempHour = "04"; }
  if (Hour == 5) { tempHour = "05"; }
  if (Hour == 6) { tempHour = "06"; }
  if (Hour == 7) { tempHour = "07"; }
  if (Hour == 8) { tempHour = "08"; }
  if (Hour == 9) { tempHour = "09"; }
  if (Hour == 10) { tempHour = "10"; }
  if (Hour == 11) { tempHour = "11"; }
 }
 if (cal.get(Calendar.AM_PM) == 1) 
 {
  if (Hour == 0) { tempHour = "12"; }
  if (Hour == 1) { tempHour = "13"; }
  if (Hour == 2) { tempHour = "14"; }
  if (Hour == 3) { tempHour = "15"; }
  if (Hour == 4) { tempHour = "16"; }
  if (Hour == 5) { tempHour = "17"; }
  if (Hour == 6) { tempHour = "18"; }
  if (Hour == 7) { tempHour = "19"; }
  if (Hour == 8) { tempHour = "20"; }
  if (Hour == 9) { tempHour = "21"; }
  if (Hour == 10) { tempHour = "22"; }
  if (Hour == 11) { tempHour = "23"; }
  if (Hour == 12) { tempHour = "00"; }
 }
 tempMinute = ""+Minute;
 if (Minute == 0) { tempMinute = "00"; }
 if (Minute == 1) { tempMinute = "01"; }
 if (Minute == 2) { tempMinute = "02"; }
 if (Minute == 3) { tempMinute = "03"; }
 if (Minute == 4) { tempMinute = "04"; }
 if (Minute == 5) { tempMinute = "05"; }
 if (Minute == 6) { tempMinute = "06"; }
 if (Minute == 7) { tempMinute = "07"; }
 if (Minute == 8) { tempMinute = "08"; }
 if (Minute == 9) { tempMinute = "09"; }
 if (Month == 1) { tempMonth = "1"; }
 if (Month == 2) { tempMonth = "2"; }
 if (Month == 3) { tempMonth = "3"; }
 if (Month == 4) { tempMonth = "4"; }
 if (Month == 5) { tempMonth = "5"; }
 if (Month == 6) { tempMonth = "6"; }
 if (Month == 7) { tempMonth = "7"; }
 if (Month == 8) { tempMonth = "8"; }
 if (Month == 9) { tempMonth = "9"; }

 updateTimeStamp = ""+Year+"."+Month+"."+Day+""+tempHour+":"+tempMinute;
} 
catch (Exception e) 
{
 updateTimeStamp = "N/A";
}

Also a quick thanks to Chad Grant, who helped out with a serializer hack. It works great.  I used control characters \u0011 and \u0012 as delimiters and added a type to allow for casting on the way back (as it aparantly wasn't all strings).