Timezone Difference

>>> import pytz
>>> import datetime
>>> chicago_timezone = pytz.timezone('America/Chicago')
>>> str(chicago_time.utcoffset(datetime.datetime.now()))
'-1 day, 19:00:00'
>>> str(chicago_time.utcoffset(datetime.datetime.now() + datetime.timedelta(days=1)))
'-1 day, 18:00:00'