code: public Date getCreationTime() {
  		calendar.set(Calendar.YEAR, 1904);
  		calendar.set(Calendar.MONTH, Calendar.JANUARY);
  		calendar.set(Calendar.DATE, 1);
  		calendar.set(Calendar.HOUR_OF_DAY, 0);
  		calendar.set(Calendar.MINUTE, 0);
  		calendar.set(Calendar.SECOND, 0);
  
  		calendar.roll(Calendar.SECOND, (int) creationTime);
  		return calendar.getTime();
  	}
docs: Gets the creation time of this presentation.
  
  @return creation time