class Date(object):
    # Note: doesn't return, or print, anything, just initializes self.
    # Also notice that this, and all other methods, takes self as a
    # parameter. Also notice the way you set default values.
    def __init__(self, year=1900, month=1, day=1):
        self.year, self.month, self.day = year, month, day

    # Here's where you define what it looks like if someone just types
    # date_one at the interactive prompt.
    def __repr__(self):
        return '{} {}, {}'.format(month_names[self.month], self.day, self.year)

    # Here's where you define what it looks like when someone calls str()
    # or print() on your instances.
    def __str__(self):
        return '{:04}-{:02}-{:02}'.format(self.year, self.month, self.day)

    # Notice that this takes an other argument, not separate year,
    # month, and day.
    def same_date_in_year(self, other):
        return (self.month, self.day) == (other.month, other.day)