add show tags of last months only

fet2020/posts/views.py

@@ -34,7 +34,7 @@ def index(request):
 
 def calendar(request):
     "Kalender Ansicht ICS zur Verknüpfung mit Outlook"
-    events = deque(Post.objects.all_post_with_date().all())
+    events = deque(Post.objects.get_all_posts_with_date())
 
     return render(
         request,