datetime are time-zoned

apps/tournament/views.py

@@ -1,6 +1,5 @@
 import random
 import zipfile
-from datetime import timezone
 from io import BytesIO
 
 from django.contrib.auth.mixins import LoginRequiredMixin
@@ -11,6 +10,7 @@ from django.http import HttpResponse
 from django.shortcuts import redirect
 from django.template.loader import render_to_string
 from django.urls import reverse_lazy
+from django.utils import timezone
 from django.utils.decorators import method_decorator
 from django.utils.translation import gettext_lazy as _
 from django.views import View