public GregorianCalendar getCalendar(boolean useTimeZone)
  Property Description  
    Argument useTimeZone Set true if the GregorianCalendar TimeZone should be set  
    Returns GregorianCalendar newly created object  
    Description Converts the DateTime object to a java.util.GregorianCalendar object  
    Remarks Converts this DateTime to a GregorianCalendar object. If the Year is 0 then the GregorianCalendar is 1BC, if the year is negative, then the GregorianCalendar year is year - 1 BC (e.g. -1 = 2BC).