Unix Timestamp from 1970
Excel Timestamp from 1900
Gap : (1970-1900) Days = 25569 Days
String rtn = "";
try{
DateFormat format = new SimpleDateFormat("yyyyMMdd");
//format.setTimeZone(TimeZone.getTimeZone("UTC"));
double excelDays = Double.parseDouble((String)valv.elementAt(0));
double unixDays = (excelDays-25569);
java.util.Date unixTime = new java.util.Date((long) ( 86400000l * unixDays));
rtn = format.format(unixTime);
out.println(rtn);
} catch(Exception e) {}