diff --git a/cfp/forms.py b/cfp/forms.py
index 91b0cb1..4ab5b90 100644
--- a/cfp/forms.py
+++ b/cfp/forms.py
@@ -373,8 +373,11 @@ class ConferenceForm(forms.ModelForm):
     class Meta:
         model = Conference
         fields = [
-            'name', 'venue', 'city', 'contact_email', 'acceptances_disclosure_date', 'schedule_publishing_date', 'schedule_redirection_url',
-            'volunteers_opening_date', 'volunteers_closing_date', 'video_publishing_date', 'reply_email', 'secure_domain', 'staff',
+            'name', 'venue', 'city', 'contact_email', 'acceptances_disclosure_date',
+            'schedule_publishing_date', 'schedule_redirection_url',
+            'volunteers_opening_date', 'volunteers_closing_date',
+            'end_date', 'video_publishing_date',
+            'reply_email', 'secure_domain', 'staff',
         ]
         widgets = {
             'staff': UsersWidget(),
diff --git a/cfp/migrations/0026_conference_end_date.py b/cfp/migrations/0026_conference_end_date.py
new file mode 100644
index 0000000..83cc1b7
--- /dev/null
+++ b/cfp/migrations/0026_conference_end_date.py
@@ -0,0 +1,18 @@
+# Generated by Django 2.0 on 2019-06-08 10:59
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cfp', '0025_auto_20171216_1546'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='conference',
+            name='end_date',
+            field=models.DateTimeField(blank=True, default=None, null=True, verbose_name='End of the conference date'),
+        ),
+    ]
diff --git a/cfp/models.py b/cfp/models.py
index ff9d025..3a18b7f 100644
--- a/cfp/models.py
+++ b/cfp/models.py
@@ -42,6 +42,7 @@ class Conference(models.Model):
     volunteers_opening_date = models.DateTimeField(null=True, blank=True, default=None, verbose_name=_('Volunteers enrollment opening date'))
     volunteers_closing_date = models.DateTimeField(null=True, blank=True, default=None, verbose_name=_('Volunteers enrollment closing date'))
     video_publishing_date = models.DateTimeField(null=True, blank=True, default=None, verbose_name=_('Video publishing date'))
+    end_date = models.DateTimeField(null=True, blank=True, default=None, verbose_name=_('End of the conference date'))
 
     custom_css = models.TextField(blank=True)
     external_css_link = models.URLField(blank=True)
@@ -52,6 +53,10 @@ class Conference(models.Model):
         closing = self.volunteers_closing_date
         return opening and opening < now and (not closing or closing > now)
 
+    @property
+    def completed(self):
+        return self.end_date and self.end_date <= timezone.now()
+
     @property
     def opened_categories(self):
         now = timezone.now()
diff --git a/cfp/views.py b/cfp/views.py
index 88a217f..b329875 100644
--- a/cfp/views.py
+++ b/cfp/views.py
@@ -14,6 +14,7 @@ from django.core.mail import send_mail
 from django.forms import modelform_factory
 from django import forms
 from django.views.decorators.http import require_http_methods
+from django.core.cache import cache
 
 from django_select2.views import AutoResponseView
 
@@ -426,7 +427,7 @@ def proposal_talk_edit(request, speaker, talk_id=None):
 def proposal_talk_acknowledgment(request, speaker, talk_id, confirm):
     # TODO: handle multiple speakers case
     talk = get_object_or_404(Talk, site=request.conference.site, speakers__pk=speaker.pk, pk=talk_id)
-    if not request.conference.disclosed_acceptances or not talk.accepted:
+    if not request.conference.disclosed_acceptances or not talk.accepted or request.conference.completed:
         raise PermissionDenied
     if talk.confirmed == confirm:
         if confirm:
@@ -1312,5 +1313,12 @@ def staff_schedule(request, program_format):
     return schedule(request, program_format=program_format, pending=True, template='cfp/staff/schedule.html', cache=False)
 
 
+@staff_required
+def schedule_evict(request):
+    cache.clear()
+    messages.success(request, _('Schedule evicted from cache.'))
+    return redirect('/')
+
+
 class Select2View(StaffRequiredMixin, AutoResponseView):
     pass