How do you set the year, month, and day in a `GregorianCalendar` object?
You set the date by calling `new GregorianCalendar(year, month, day)` with the parameters.
That's not quite right. While you can use the constructor to set the date, the method `set()` is more commonly used after instantiation.
Would you like me to explain how to use the `set()` method to modify a `GregorianCalendar` object?