Filtering by month doesn't work

Hi,

do you have any clue why this does not work?

def index(request):
if request.method == 'POST' and request.POST:
event_form = EventForm(request.POST)
event = event_form.save()

today = datetime.date.today();
year = int(today.strftime('%Y'))
month = int(today.strftime('%m'))
events = Event.objects.filter(end__month='11')
# events = Event.objects.all()
pdb.set_trace()
cal = jvccalendar.HTMLCalendar(jvccalendar.MONDAY).formatmonth(year, month, events)
form = EventForm()
return render_to_response('jvc/index.html', {'cal': cal, 'side_form': form}, context_instance=RequestContext(request))

I am still getting "events" as empty, filtering using filter(end_start='2013') works, but filtering by month does not, I googled as much as I could, but no luck. I copied code from StackOverflow, but no luck.... 
Thank you!

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