diff --git a/gaehsnitz/migrations/0007_drink_category.py b/gaehsnitz/migrations/0007_drink_category.py
index 0079559..c9ee39e 100644
--- a/gaehsnitz/migrations/0007_drink_category.py
+++ b/gaehsnitz/migrations/0007_drink_category.py
@@ -4,15 +4,25 @@ from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
-
     dependencies = [
-        ('gaehsnitz', '0006_user_payment'),
+        ("gaehsnitz", "0006_user_payment"),
     ]
 
     operations = [
         migrations.AddField(
-            model_name='drink',
-            name='category',
-            field=models.CharField(choices=[('beer', 'Bier'), ('radler', 'Radler'), ('alc_free_beer', 'Bier alkoholfrei'), ('soft', 'Softdrink'), ('water', 'Wasser')], default='beer', max_length=16, verbose_name='Kategorie'),
+            model_name="drink",
+            name="category",
+            field=models.CharField(
+                choices=[
+                    ("beer", "Bier"),
+                    ("radler", "Radler"),
+                    ("alc_free_beer", "Bier alkoholfrei"),
+                    ("soft", "Softdrink"),
+                    ("water", "Wasser"),
+                ],
+                default="beer",
+                max_length=16,
+                verbose_name="Kategorie",
+            ),
         ),
     ]
diff --git a/gaehsnitz/migrations/0008_alter_drink_category.py b/gaehsnitz/migrations/0008_alter_drink_category.py
index 95125c3..3c8aa65 100644
--- a/gaehsnitz/migrations/0008_alter_drink_category.py
+++ b/gaehsnitz/migrations/0008_alter_drink_category.py
@@ -4,15 +4,26 @@ from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
-
     dependencies = [
-        ('gaehsnitz', '0007_drink_category'),
+        ("gaehsnitz", "0007_drink_category"),
     ]
 
     operations = [
         migrations.AlterField(
-            model_name='drink',
-            name='category',
-            field=models.CharField(choices=[('beer', 'Bier'), ('radler', 'Radler'), ('alc_free_beer', 'Bier alkoholfrei'), ('alc_free_radler', 'Radler alkoholfrei'), ('soft', 'Softdrink'), ('water', 'Wasser')], default='beer', max_length=16, verbose_name='Kategorie'),
+            model_name="drink",
+            name="category",
+            field=models.CharField(
+                choices=[
+                    ("beer", "Bier"),
+                    ("radler", "Radler"),
+                    ("alc_free_beer", "Bier alkoholfrei"),
+                    ("alc_free_radler", "Radler alkoholfrei"),
+                    ("soft", "Softdrink"),
+                    ("water", "Wasser"),
+                ],
+                default="beer",
+                max_length=16,
+                verbose_name="Kategorie",
+            ),
         ),
     ]
diff --git a/gaehsnitz/suff.py b/gaehsnitz/suff.py
index 480586c..e1dc5c3 100644
--- a/gaehsnitz/suff.py
+++ b/gaehsnitz/suff.py
@@ -19,9 +19,11 @@ from gaehsnitz.models import Consumption, Donation, Drink, Payment, UserPayment,
 User = get_user_model()
 
 BERLIN = ZoneInfo("Europe/Berlin")
-BOOKING_START = datetime(2026, 6, 11, 0, 0, 0, tzinfo=BERLIN)
-BOOKING_END = datetime(2026, 6, 14, 23, 59, 59, tzinfo=BERLIN)
-READONLY_END = datetime(2026, 6, 21, 23, 59, 59, tzinfo=BERLIN)
+# TEST WINDOW (2026-05-15 – 2026-05-31): enabled early for pre-festival testing.
+# Original festival phase: BOOKING_START = 2026-06-11, BOOKING_END = 2026-06-14.
+# Switch back to original dates before the festival.
+BOOKING_START = datetime(2026, 5, 15, 0, 0, 0, tzinfo=BERLIN)
+BOOKING_END = datetime(2026, 5, 31, 23, 59, 59, tzinfo=BERLIN)
 
 DAY_BY_WEEKDAY = {3: 1, 4: 2, 5: 3, 6: 4}
 
@@ -38,17 +40,15 @@ def _phase():
         return "before"
     if now <= BOOKING_END:
         return "booking"
-    if now <= READONLY_END:
-        return "readonly"
     return "closed"
 
 
 def _require_open(request):
-    """Raise 404 once tool is fully closed. Return current phase otherwise."""
+    """Redirect to closed page when tool is not in booking phase."""
     phase = _phase()
-    if phase == "closed":
-        raise Http404
-    return phase
+    if phase in ("before", "closed"):
+        return HttpResponseRedirect(reverse("suff:closed")), None
+    return None, phase
 
 
 def _current_festival_day():
@@ -84,7 +84,9 @@ def _tab_context(user):
 
 @require_http_methods(["GET", "POST"])
 def name_view(request):
-    phase = _require_open(request)
+    redirect, phase = _require_open(request)
+    if redirect:
+        return redirect
     if request.user.is_authenticated:
         return HttpResponseRedirect(reverse("suff:me"))
 
@@ -121,7 +123,9 @@ def name_view(request):
 
 @require_http_methods(["GET", "POST"])
 def pin_view(request):
-    phase = _require_open(request)
+    redirect, phase = _require_open(request)
+    if redirect:
+        return redirect
     username = request.session.get("pending_username")
     mode = request.session.get("pending_mode")
     if not username or mode not in ("create", "login"):
@@ -172,7 +176,9 @@ def pin_view(request):
 @login_required
 @require_http_methods(["GET"])
 def me_view(request):
-    phase = _require_open(request)
+    redirect, phase = _require_open(request)
+    if redirect:
+        return redirect
     drinks = (
         Drink.objects.filter(year=current_year())
         .annotate(
@@ -214,7 +220,9 @@ def me_view(request):
 @login_required
 @require_http_methods(["POST"])
 def book_view(request):
-    phase = _require_open(request)
+    redirect, phase = _require_open(request)
+    if redirect:
+        return redirect
     if phase != "booking":
         raise Http404
 
@@ -237,9 +245,9 @@ def book_view(request):
 @login_required
 @require_http_methods(["GET", "POST"])
 def pay_view(request):
-    phase = _require_open(request)
-    if phase == "before":
-        raise Http404
+    redirect, phase = _require_open(request)
+    if redirect:
+        return redirect
 
     error = None
     if request.method == "POST":
@@ -379,6 +387,13 @@ def dashboard_view(request):
 
 @require_http_methods(["POST"])
 def logout_view(request):
-    _require_open(request)
     logout(request)
     return HttpResponseRedirect(reverse("suff:name"))
+
+
+@require_http_methods(["GET"])
+def closed_view(request):
+    phase = _phase()
+    if phase == "booking":
+        return HttpResponseRedirect(reverse("suff:name"))
+    return render(request, "suff/closed.html", {"phase": phase, "booking_start": BOOKING_START})
diff --git a/gaehsnitz/suff_urls.py b/gaehsnitz/suff_urls.py
index 1776cc6..a80115a 100644
--- a/gaehsnitz/suff_urls.py
+++ b/gaehsnitz/suff_urls.py
@@ -2,6 +2,7 @@ from django.urls import path
 
 from gaehsnitz.suff import (
     book_view,
+    closed_view,
     dashboard_view,
     logout_view,
     me_view,
@@ -14,6 +15,7 @@ app_name = "suff"
 
 urlpatterns = [
     path("", name_view, name="name"),
+    path("closed/", closed_view, name="closed"),
     path("pin/", pin_view, name="pin"),
     path("me/", me_view, name="me"),
     path("book/", book_view, name="book"),
diff --git a/gaehsnitz/templates/suff/closed.html b/gaehsnitz/templates/suff/closed.html
new file mode 100644
index 0000000..98e8d75
--- /dev/null
+++ b/gaehsnitz/templates/suff/closed.html
@@ -0,0 +1,10 @@
+{% extends "suff/base.html" %}
+
+{% block content %}
+{% if phase == "before" %}
+    <p>Hier könnt ihr während des Festivals eure Getränke selbst buchen und den Überblick über eure Rechnung behalten — die digitale Strichliste.</p>
+    <p>Das Tool startet am <strong>{{ booking_start|date:"d.m.Y" }}</strong> — schaut dann nochmal rein!</p>
+{% else %}
+    <p>Das Festival ist vorbei. Das Tool ist jetzt deaktiviert.</p>
+{% endif %}
+{% endblock %}
diff --git a/gaehsnitz/templates/suff/me.html b/gaehsnitz/templates/suff/me.html
index 69765b8..b50d46a 100644
--- a/gaehsnitz/templates/suff/me.html
+++ b/gaehsnitz/templates/suff/me.html
@@ -3,10 +3,6 @@
 {% block content %}
 <h2>Hallo {{ tab_user.username }}</h2>
 
-{% if phase == "readonly" %}
-    <p><i>Festival vorbei. Buchungen geschlossen, nur noch Anzeige.</i></p>
-{% endif %}
-
 {% if booked_drink %}
     <div class="toast" role="status">
         Gebucht: +1 {{ booked_drink.name }}