My partner got me totally confused about how old, I, and everyone else is; so this is to prove my own age to myself.

age.py

#!/usr/bin/env python
import sys


MONTHS_IN_YEAR = 11


class Age(object):

    years = 0
    months = 0

    def __init__(self, *args, **kwargs):
        self.start = kwargs.get('start', 1984)
        self.end = kwargs.get('end', 2011)

    def increment_month(self):
        self.months += 1

        return self.months

    def increment_year(self):
        self.years += 1

        return self.years

    def run_simulation(self):
        for year in range(self.start, self.end):
            print 'The year is %s' % year
            for month in range(0, MONTHS_IN_YEAR):
                print 'You are %s years and %s months' % (
                        self.years,
                        self.increment_month(),
                    )
            print 'That was your birthday, you are now %s' % self.increment_year()
            self.months = 0


if __name__ == '__main__':
    try:
        age = Age(start=int(sys.argv[1]), end=int(sys.argv[2]))
    except IndexError:
        age = Age()

    age.run_simulation()