#! /usr/bin/env python

# Calculate your unbirthday count (see Alice in Wonderland).

# This is defined as the number of days from your birth until today

# that weren't your birthday.  (The day you were born is not counted).

# Leap years make it interesting.

import sys

import time

import calendar

def main():

    # Note that the range checks below also check for bad types,

    # e.g. 3.14 or ().  However syntactically invalid replies

    # will raise an exception.

    if sys.argv[1:]:

        year = int(sys.argv[1])

    else:

        year = int(raw_input('In which year were you born? '))

    if 0<=year<100:

        print "I'll assume that by", year,

        year = year + 1900

        print 'you mean', year, 'and not the early Christian era'

    elif not (1850<=year<=2002):

        print "It's hard to believe you were born in", year

        return

    #

    if sys.argv[2:]:

        month = int(sys.argv[2])

    else:

        month = int(raw_input('And in which month? (1-12) '))

    if not (1<=month<=12):

        print 'There is no month numbered', month

        return

    #

    if sys.argv[3:]:

        day = int(sys.argv[3])

    else:

        day = int(raw_input('And on what day of that month? (1-31) '))

    if month == 2 and calendar.isleap(year):

        maxday = 29

    else:

        maxday = calendar.mdays[month]

    if not (1<=day<=maxday):

        print 'There are no', day, 'days in that month!'

        return

    #

    bdaytuple = (year, month, day)

    bdaydate = mkdate(bdaytuple)

    print 'You were born on', format(bdaytuple)

    #

    todaytuple = time.localtime()[:3]

    todaydate = mkdate(todaytuple)

    print 'Today is', format(todaytuple)

    #

    if bdaytuple > todaytuple:

        print 'You are a time traveler.  Go back to the future!'

        return

    #

    if bdaytuple == todaytuple:

        print 'You were born today.  Have a nice life!'

        return

    #

    days = todaydate - bdaydate

    print 'You have lived', days, 'days'

    #

    age = 0

    for y in range(year, todaytuple[0] + 1):

        if bdaytuple < (y, month, day) <= todaytuple:

            age = age + 1

    #

    print 'You are', age, 'years old'

    #

    if todaytuple[1:] == bdaytuple[1:]:

        print 'Congratulations!  Today is your', nth(age), 'birthday'

        print 'Yesterday was your',

    else:

        print 'Today is your',

    print nth(days - age), 'unbirthday'

def format((year, month, day)):

    return '%d %s %d' % (day, calendar.month_name[month], year)

def nth(n):

    if n == 1: return '1st'

    if n == 2: return '2nd'

    if n == 3: return '3rd'

    return '%dth' % n

def mkdate((year, month, day)):

    # Januari 1st, in 0 A.D. is arbitrarily defined to be day 1,

    # even though that day never actually existed and the calendar

    # was different then...

    days = year*365                 # years, roughly

    days = days + (year+3)//4        # plus leap years, roughly

    days = days - (year+99)//100     # minus non-leap years every century

    days = days + (year+399)//400    # plus leap years every 4 centirues

    for i in range(1, month):

        if i == 2 and calendar.isleap(year):

            days = days + 29

        else:

            days = days + calendar.mdays[i]

    days = days + day

    return days

if __name__ == "__main__":

    main()