#!/usr/bin/python

import datetime

student_tuple = [ ('ykjsdf', 'A', 17, datetime.date(2014,10,15)), ('accjr', 'C', 11, None), ('dgekw', 'B', 5, datetime.date(1987,03,03)) ]

result = []

result = sorted(student_tuple, key=lambda student : student[3])

print result