diff --git a/shiftregister/app/models.py b/shiftregister/app/models.py
index 8d4c839..acfab98 100644
--- a/shiftregister/app/models.py
+++ b/shiftregister/app/models.py
@@ -28,7 +28,43 @@ class Room(models.Model):
         return self.shift_set.filter(deleted=False)
 
 
+class ShiftManager(models.Manager):
+    def with_reg_count(self):
+        return (
+            self.get_queryset()
+            .annotate(
+                reg_count=Count(
+                    "shiftregistration",
+                    distinct=True,
+                    filter=Q(
+                        shiftregistration__state__in=(
+                            ShiftRegistration.RegState.REGISTERED,
+                            ShiftRegistration.RegState.CHECKED_IN,
+                        )
+                    ),
+                )
+            )
+            .select_related("room")
+        )
+
+
+class DisplayShiftManager(ShiftManager):
+    def get_queryset(self):
+        return (
+            super()
+            .get_queryset()
+            .select_related("event__calendar")
+            .filter(
+                Q(event__isnull=True) | Q(event__calendar__restricted=False),
+                deleted=False,
+            )
+        )
+
+
 class Shift(models.Model):
+    all_objects = ShiftManager()
+    objects = DisplayShiftManager()
+
     room = models.ForeignKey(Room, on_delete=models.RESTRICT)
     start_at = models.DateTimeField(db_index=True)
     duration = models.DurationField()
@@ -38,20 +74,6 @@ class Shift(models.Model):
     description = models.TextField(blank=True, default="")
     deleted = models.BooleanField(default=False, db_index=True)
 
-    def with_reg_count():
-        return Shift.objects.annotate(
-            reg_count=Count(
-                "shiftregistration",
-                distinct=True,
-                filter=Q(
-                    shiftregistration__state__in=(
-                        ShiftRegistration.RegState.REGISTERED,
-                        ShiftRegistration.RegState.CHECKED_IN,
-                    )
-                ),
-            )
-        ).select_related("room")
-
     def __str__(self):
         return f"{self.room.name}: {self.start_at}"
 
diff --git a/shiftregister/app/signals.py b/shiftregister/app/signals.py
index ecd3612..8533342 100644
--- a/shiftregister/app/signals.py
+++ b/shiftregister/app/signals.py
@@ -13,7 +13,7 @@ def notify_shift_changed(sender, **kwargs):
     if issubclass(sender, Shift):
         instance = kwargs["instance"]
         try:
-            prev = Shift.objects.get(pk=instance.id)
+            prev = Shift.all_objects.get(pk=instance.id)
         except Shift.DoesNotExist:
             return
 
diff --git a/shiftregister/app/templates/shift.html b/shiftregister/app/templates/shift.html
index 9904c73..af2214b 100644
--- a/shiftregister/app/templates/shift.html
+++ b/shiftregister/app/templates/shift.html
@@ -13,11 +13,13 @@
     <div class="notification">Diese Schicht wurde gelöscht.</div>
 {% endif %}
 {% if not can_register and not is_registered %}
-    {% if has_overlap %}
+{% if shift.restricted %}
+    <div class="notification is-warning">Diese Schicht kann nur von Teamis besetzt werden, daher kannst du dich nicht anmelden.</div>
+{% elif has_overlap %}
     <div class="notification is-warning">Du hast bereits eine überlappende Schicht zu dieser Zeit: <a href="{% url 'shift' overlapping_shift.id %}">{{ overlapping_shift.room.name }} ({{ overlapping_shift.start_at }})</a></div>
-    {% else %}
+{% else %}
     <div class="notification">Diese Schicht ist bereits besetzt.</div>
-    {% endif %}
+{% endif %}
 {% endif %}
     <div class="content">
         <p>
diff --git a/shiftregister/app/views.py b/shiftregister/app/views.py
index 0bca633..96efbf1 100644
--- a/shiftregister/app/views.py
+++ b/shiftregister/app/views.py
@@ -8,6 +8,7 @@ from django.core.cache import cache
 from django.db import transaction
 from django.db.models import Count, ExpressionWrapper, F, Q
 from django.db.models.fields import DateTimeField
+from django.db.models.functions import Coalesce
 from django.shortcuts import get_object_or_404, redirect, render
 from django.utils import timezone
 from dynamic_preferences.registries import global_preferences_registry
@@ -30,7 +31,7 @@ def index(request):
         event_end_at = global_preferences["helper__event_end_at"]
         days = (
             Shift.objects.filter(
-                deleted=False, start_at__gte=event_start_at, start_at__lte=event_end_at
+                start_at__gte=event_start_at, start_at__lte=event_end_at
             )
             .datetimes("start_at", "day")
             .all()
@@ -65,13 +66,12 @@ def index(request):
     # dont show shifts starting in <60 minutes?
     # currently only sorts by date
     free_shifts = (
-        Shift.with_reg_count()
+        Shift.objects.with_reg_count()
         .filter(
             help_wanted,
             start_at__gte=day + timedelta(hours=6),
             start_at__lte=day + timedelta(hours=30),
             start_at__gt=timezone.now(),
-            deleted=False,
         )
         .order_by("start_at")
         for day in days
@@ -191,7 +191,12 @@ def register(request):
 
 @event_state
 def shift(request, shiftid):
-    shift = get_object_or_404(Shift.with_reg_count(), pk=shiftid)
+    shift = get_object_or_404(
+        Shift.all_objects.with_reg_count()
+        .select_related("event__calendar")
+        .annotate(restricted=Coalesce("event__calendar__restricted", False)),
+        pk=shiftid,
+    )
     helper = request.helper
     context = {
         "enable_asta": global_preferences["helper__enable_asta"],
@@ -201,15 +206,14 @@ def shift(request, shiftid):
         "shift": shift,
         "shift_form": EmptyForm,
     }
-
-    # this currently ignores date/time
-    request.session["last_seen_shift"] = shiftid
-    if (
+    context["can_register"] = (
         shift.required_helpers > shift.registration_count()
         or shift.required_helpers == 0
         and shift.room.required_helpers > shift.registration_count()
-    ):
-        context["can_register"] = True
+    ) and not shift.restricted
+
+    # this currently ignores date/time
+    request.session["last_seen_shift"] = shiftid
 
     if helper:
         context["helper"] = helper
diff --git a/shiftregister/importer/admin.py b/shiftregister/importer/admin.py
index d5e6786..2f5afe6 100644
--- a/shiftregister/importer/admin.py
+++ b/shiftregister/importer/admin.py
@@ -10,5 +10,5 @@ def update_calendar(modeladmin, request, queryset):
 
 @admin.register(Calendar)
 class CalendarAdmin(admin.ModelAdmin):
-    list_display = ("name", "url", "needs_fallback", "has_errors")
+    list_display = ("name", "url", "needs_fallback", "restricted", "has_errors")
     actions = (update_calendar,)
diff --git a/shiftregister/importer/migrations/0005_calendar_restricted.py b/shiftregister/importer/migrations/0005_calendar_restricted.py
new file mode 100644
index 0000000..4a0fd0e
--- /dev/null
+++ b/shiftregister/importer/migrations/0005_calendar_restricted.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.0.4 on 2025-05-16 22:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("importer", "0004_calendar_name"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="calendar",
+            name="restricted",
+            field=models.BooleanField(default=False),
+        ),
+    ]
diff --git a/shiftregister/importer/models.py b/shiftregister/importer/models.py
index ed9aa71..76e46ef 100644
--- a/shiftregister/importer/models.py
+++ b/shiftregister/importer/models.py
@@ -8,6 +8,7 @@ class Calendar(models.Model):
     needs_fallback = models.BooleanField(default=False, editable=True)
     has_errors = models.BooleanField(default=False, editable=False)
     name = models.CharField(max_length=255, null=True, blank=True)
+    restricted = models.BooleanField(default=False)
 
     def update(self):
         # break circular import
@@ -18,5 +19,7 @@ class Calendar(models.Model):
 
 
 class Event(Shift):
+    objects = models.Manager()
+
     uuid = models.UUIDField(primary_key=True, editable=False)
     calendar = models.ForeignKey(Calendar, on_delete=models.CASCADE)
diff --git a/shiftregister/metrics/views.py b/shiftregister/metrics/views.py
index 1c77f50..201263b 100644
--- a/shiftregister/metrics/views.py
+++ b/shiftregister/metrics/views.py
@@ -35,7 +35,7 @@ def metrics(request):
                     ),
                     (
                         "fallback_shifts_full",
-                        Shift.with_reg_count()
+                        Shift.objects.with_reg_count()
                         .annotate(
                             real_required_helpers=Case(
                                 When(
@@ -46,7 +46,6 @@ def metrics(request):
                             fallbackassignment_count=Count("fallbackassignment"),
                         )
                         .filter(
-                            deleted=False,
                             reg_count__gte=F("real_required_helpers"),
                             fallbackassignment_count__gt=0,
                         )
@@ -96,16 +95,14 @@ def metrics(request):
                     ),
                     (
                         "helpers_required",
-                        Shift.objects.filter(deleted=False)
-                        .annotate(
+                        Shift.objects.annotate(
                             real_required_helpers=Case(
                                 When(
                                     required_helpers=0, then=F("room__required_helpers")
                                 ),
                                 default=F("required_helpers"),
                             )
-                        )
-                        .aggregate(sum=Sum("real_required_helpers"))["sum"]
+                        ).aggregate(sum=Sum("real_required_helpers"))["sum"]
                         or 0,
                     ),
                     (
@@ -124,15 +121,15 @@ def metrics(request):
                     *(
                         (
                             f'shifts{{room="{room.name}"}}',
-                            Shift.objects.filter(deleted=False, room=room).count(),
+                            Shift.objects.filter(room=room).count(),
                         )
                         for room in Room.objects.all()
                     ),
                     *(
                         (
                             f'shifts_occupied{{room="{room.name}"}}',
-                            Shift.with_reg_count()
-                            .filter(deleted=False, reg_count__gte=1, room=room)
+                            Shift.objects.with_reg_count()
+                            .filter(reg_count__gte=1, room=room)
                             .count(),
                         )
                         for room in Room.objects.all()
@@ -140,7 +137,7 @@ def metrics(request):
                     *(
                         (
                             f'shifts_full{{room="{room.name}"}}',
-                            Shift.with_reg_count()
+                            Shift.objects.with_reg_count()
                             .annotate(
                                 real_required_helpers=Case(
                                     When(
@@ -151,7 +148,7 @@ def metrics(request):
                                 )
                             )
                             .filter(
-                                deleted=False,
+                                reg_count__gt=0,
                                 reg_count__gte=F("real_required_helpers"),
                                 room=room,
                             )
diff --git a/shiftregister/signage/views.py b/shiftregister/signage/views.py
index fe1fbf3..c1bb3a8 100644
--- a/shiftregister/signage/views.py
+++ b/shiftregister/signage/views.py
@@ -33,16 +33,16 @@ def public_dashboard(request):
         )
 
     num_free_shifts = (
-        Shift.with_reg_count()
-        .filter(help_wanted, deleted=False, start_at__gte=timezone.now())
+        Shift.objects.with_reg_count()
+        .filter(help_wanted, start_at__gte=timezone.now())
         .count()
     )
     if num_free_shifts > 0:
         facts.append(("Zu übernehmende Schichten", num_free_shifts))
 
     next_free_shifts = (
-        Shift.with_reg_count()
-        .filter(help_wanted, start_at__gt=timezone.now(), deleted=False)
+        Shift.objects.with_reg_count()
+        .filter(help_wanted, start_at__gt=timezone.now())
         .order_by("start_at")[:4]
     )
 
@@ -79,7 +79,7 @@ def team_dashboard(request):
         day = today
 
     team_shifts = (
-        Shift.with_reg_count()
+        Shift.all_objects.with_reg_count()
         .annotate(
             end_at=ExpressionWrapper(
                 F("start_at") + F("duration"), output_field=models.DateTimeField()
diff --git a/shiftregister/team/views.py b/shiftregister/team/views.py
index 9ad36af..21aae57 100644
--- a/shiftregister/team/views.py
+++ b/shiftregister/team/views.py
@@ -44,7 +44,7 @@ def shift_overview(request):
 
     context = {}
     context["running_shifts"] = (
-        Shift.with_reg_count()
+        Shift.all_objects.with_reg_count()
         .prefetch_related("event__calendar")
         .annotate(
             checkin_count=Count(
@@ -65,7 +65,7 @@ def shift_overview(request):
     )
 
     context["next_shifts"] = (
-        Shift.with_reg_count()
+        Shift.all_objects.with_reg_count()
         .prefetch_related("event__calendar")
         .annotate(checkin_count=checkin_count)
         .filter(
@@ -80,7 +80,7 @@ def shift_overview(request):
     context["next_shifts_per_room"] = filter(
         lambda x: x is not None,
         (
-            Shift.with_reg_count()
+            Shift.all_objects.with_reg_count()
             .prefetch_related("event__calendar")
             .filter(room=room, start_at__gt=timezone.now(), deleted=False)
             .order_by("start_at")
@@ -99,7 +99,10 @@ def add_helper_shift(self):
 @login_required
 def shift_detail(request, pk):
     shift = get_object_or_404(
-        Shift.with_reg_count().prefetch_related("shiftregistration_set__helper"), pk=pk
+        Shift.all_objects.with_reg_count().prefetch_related(
+            "shiftregistration_set__helper"
+        ),
+        pk=pk,
     )
     form = HelperShift()
     if request.method == "POST":
@@ -217,7 +220,7 @@ class ShiftList(LoginRequiredMixin, ListView):
     title = "Alle Schichten"
 
     def get_queryset(self):
-        return Shift.with_reg_count()
+        return Shift.all_objects.with_reg_count()
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
@@ -236,7 +239,7 @@ class FreeShiftList(ShiftList):
             required_helpers=0
         ) & Q(room__required_helpers__gt=F("reg_count"))
         return (
-            Shift.with_reg_count()
+            Shift.all_objects.with_reg_count()
             .annotate(
                 end_at=ExpressionWrapper(
                     F("start_at") + F("duration"),
@@ -265,7 +268,7 @@ class RoomShiftList(ShiftList):
             required_helpers=0
         ) & Q(room__required_helpers__gt=F("reg_count"))
         return (
-            Shift.with_reg_count()
+            Shift.all_objects.with_reg_count()
             .filter(
                 deleted=False,
                 room=room,