private boolean checkBack(LinkedList<EventInfo> events, Date d1, Date d2) {
        print(events);
        if(events.size() != 2) return false;
        EventInfo e1 = events.get(0);
        if(e1.isDstAheadHour != false || e1.isDstBackHour1 != true || e1.isDstBackHour2 != false || !e1.date.equals(d1))
            return false;
        EventInfo e2 = events.get(1);
        if(e2.isDstAheadHour != false || e2.isDstBackHour1 != false || e2.isDstBackHour2 != true || !e2.date.equals(d2))
            return false;
        return true;
    }