// test main for Day
    public static void main(String[] args) {
        // set up some events
        Event ev1 = new Event(1000, 1050, "COS126 lecture");
        Event ev2 = new Event(1230, 1320, "COS126 precept");
        Event ev3 = new Event(1200, 1300, "lunch with Bob");
        
        // Add to the same day
        Day tues = new Day();
        tues.addEvent(ev2);
        tues.addEvent(ev1);
        tues.addEvent(ev3);
        
        // Output the events for the day
        tues.show();
    }