From d926030bf67719a5cb9fbca9110bd4418573d46a Mon Sep 17 00:00:00 2001
From: luelista <weller@rami.io>
Date: Fri, 2 May 2025 10:22:04 +0200
Subject: [PATCH] Event list: fix parsing of date query parameter (#5047)

Use the same localization formats as used when generating the value
---
 src/pretix/control/views/typeahead.py | 20 ++++----------------
 src/pretix/helpers/i18n.py            | 14 ++++++++++++++
 src/pretix/presale/views/organizer.py |  6 ++----
 3 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/src/pretix/control/views/typeahead.py b/src/pretix/control/views/typeahead.py
index e499f75ac6..4220823d82 100644
--- a/src/pretix/control/views/typeahead.py
+++ b/src/pretix/control/views/typeahead.py
@@ -42,7 +42,7 @@ from django.db.models.functions import Coalesce, Greatest
 from django.http import JsonResponse
 from django.shortcuts import get_object_or_404
 from django.urls import reverse
-from django.utils.formats import date_format, get_format
+from django.utils.formats import date_format
 from django.utils.timezone import make_aware
 from django.utils.translation import gettext as _, pgettext
 
@@ -56,7 +56,7 @@ from pretix.control.permissions import (
     event_permission_required, organizer_permission_required,
 )
 from pretix.helpers.daterange import daterange
-from pretix.helpers.i18n import i18ncomp
+from pretix.helpers.i18n import i18ncomp, parse_date_localized
 
 
 def serialize_user(u):
@@ -408,13 +408,7 @@ def subevent_select2(request, **kwargs):
     qf = Q(name__icontains=i18ncomp(query)) | Q(location__icontains=query)
     tz = request.event.timezone
 
-    dt = None
-    for f in get_format('DATE_INPUT_FORMATS'):
-        try:
-            dt = datetime.strptime(query, f)
-            break
-        except (ValueError, TypeError):
-            continue
+    dt = parse_date_localized(query)
 
     if dt:
         dt_start = make_aware(datetime.combine(dt.date(), time(hour=0, minute=0, second=0)), tz)
@@ -458,13 +452,7 @@ def quotas_select2(request, **kwargs):
     qf = Q(name__icontains=query) | Q(subevent__name__icontains=i18ncomp(query))
     tz = request.event.timezone
 
-    dt = None
-    for f in get_format('DATE_INPUT_FORMATS'):
-        try:
-            dt = datetime.strptime(query, f)
-            break
-        except (ValueError, TypeError):
-            continue
+    dt = parse_date_localized(query)
 
     if dt and request.event.has_subevents:
         dt_start = make_aware(datetime.combine(dt.date(), time(hour=0, minute=0, second=0)), tz)
diff --git a/src/pretix/helpers/i18n.py b/src/pretix/helpers/i18n.py
index 9f4c1071a5..42c91b50e3 100644
--- a/src/pretix/helpers/i18n.py
+++ b/src/pretix/helpers/i18n.py
@@ -23,7 +23,9 @@ import gettext as gettext_module
 import json
 import os
 import re
+from datetime import datetime
 from functools import lru_cache
+from typing import Optional
 
 from django.apps import apps
 from django.conf import settings
@@ -222,3 +224,15 @@ def get_language_score(locale):
     else:
         score = len(list(catalog.items())) or 1
     return score
+
+
+def parse_date_localized(date_str) -> Optional[datetime]:
+    """Parses a date according to the localized date input formats. Returns None if invalid."""
+    dt = None
+    for f in get_format('DATE_INPUT_FORMATS'):
+        try:
+            dt = datetime.strptime(date_str, f)
+            break
+        except (ValueError, TypeError):
+            continue
+    return dt
diff --git a/src/pretix/presale/views/organizer.py b/src/pretix/presale/views/organizer.py
index b0098ee6b5..d2005b766d 100644
--- a/src/pretix/presale/views/organizer.py
+++ b/src/pretix/presale/views/organizer.py
@@ -70,6 +70,7 @@ from pretix.helpers.formats.en.formats import (
     SHORT_MONTH_DAY_FORMAT, WEEK_FORMAT,
 )
 from pretix.helpers.http import redirect_to_url
+from pretix.helpers.i18n import parse_date_localized
 from pretix.helpers.thumb import get_thumbnail
 from pretix.multidomain.urlreverse import build_absolute_uri, eventreverse
 from pretix.presale.forms.organizer import EventListFilterForm
@@ -927,10 +928,7 @@ class DayCalendarView(OrganizerViewMixin, EventListMixin, TemplateView):
     def _set_date(self):
         if 'date' in self.request.GET:
             self.tz = self.request.organizer.timezone
-            try:
-                self.date = dateutil.parser.parse(self.request.GET.get('date')).date()
-            except ValueError:
-                self.date = now().astimezone(self.tz).date()
+            self.date = parse_date_localized(self.request.GET.get('date')).date() or now().astimezone(self.tz).date()
         else:
             self._set_date_to_next_event()