#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2008 Doug Hellmann All rights reserved.
     #
     """Calculations with dates.
     """
     
     __version__ = "$Id$"
     #end_pymotw_header
     
     import datetime
     
     today = datetime.date.today()
     print 'Today    :', today
     
     one_day = datetime.timedelta(days=1)
     print 'One day  :', one_day
     
     yesterday = today - one_day
     print 'Yesterday:', yesterday
     
     tomorrow = today + one_day
     print 'Tomorrow :', tomorrow
     
     print 'tomorrow - yesterday:', tomorrow - yesterday
     print 'yesterday - tomorrow:', yesterday - tomorrow