diff --git a/alkatorapi/views.py b/alkatorapi/views.py
index f4d03c3..5bef6a1 100644
--- a/alkatorapi/views.py
+++ b/alkatorapi/views.py
@@ -42,8 +42,8 @@ def register(request):
     except:
         return HttpResponse('{"reason":"Špatný formát datu narození!"}', status=400, content_type='application/json')
 
-    date = datetime.today()
-    invoice_id = date.year * 1000000 + date.month * 10000 + date.day * 100
+    invoice_date = invoice_datetime.today()
+    invoice_id = invoice_date.year * 1000000 + invoice_date.month * 10000 + invoice_date.day * 100
 
     latest_user = User.objects.filter.latest("invoice_id")
     if latest_user.invoice_id < invoice_id: