diff --git a/dav_event_office/templates/dav_event_office/event_detail.html b/dav_event_office/templates/dav_event_office/event_detail.html
index ef1402e..8ac5fdc 100644
--- a/dav_event_office/templates/dav_event_office/event_detail.html
+++ b/dav_event_office/templates/dav_event_office/event_detail.html
@@ -39,8 +39,10 @@
                         <div class="pull-right">
                             {% if not event.registration_required %}
                                 <span class="label label-success">{% trans 'Anmeldung nicht erforderlich' %}</span>
-                            {% elif is_done %}
-                                <span class="label label-default">{% trans 'Veranstaltung beendet' %}</span>
+                           {% elif is_canceled %}
+                                <span class="label label-dav-mandarin">{% trans 'Veranstaltung abgesagt' %}</span>
+                            {% elif is_realized or is_expired %}
+                                <span class="label label-dav-lime">{% trans 'Veranstaltung beendet' %}</span>
                             {% elif event.registration_closed %}
                                 <span class="label label-danger">{% trans 'Anmeldung geschlossen' %}</span>
                             {% elif event.is_deadline_expired %}
diff --git a/dav_events/emails.py b/dav_events/emails.py
index 79fdce3..0b852af 100644
--- a/dav_events/emails.py
+++ b/dav_events/emails.py
@@ -115,3 +115,19 @@ class EventRegistrationClosedMail(AbstractEventMail):
         context = super(EventRegistrationClosedMail, self)._get_context_data(extra_context=extra_context)
         context['editor'] = self._editor
         return context
+
+
+class EventCanceledMail(AbstractEventMail):
+    _subject = u'Veranstaltung abgesagt'
+    _template_name = 'dav_events/emails/event_canceled.txt'
+
+    def __init__(self, editor=None, *args, **kwargs):
+        self._editor = editor
+        super(EventCanceledMail, self).__init__(*args, **kwargs)
+
+    def _get_context_data(self, extra_context=None):
+        context = super(EventCanceledMail, self)._get_context_data(extra_context=extra_context)
+        context['editor'] = self._editor
+        return context
+
+
diff --git a/dav_events/migrations/0041_auto_20210107_1220.py b/dav_events/migrations/0041_auto_20210107_1220.py
new file mode 100644
index 0000000..ac5b547
--- /dev/null
+++ b/dav_events/migrations/0041_auto_20210107_1220.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.29 on 2021-01-07 11:20
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dav_events', '0040_auto_20201216_1712'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='eventstatus',
+            name='bootstrap_context',
+            field=models.CharField(blank=True, choices=[('default', 'default'), ('primary', 'primary'), ('success', 'success'), ('info', 'info'), ('warning', 'warning'), ('danger', 'danger'), ('black', 'black'), ('dav-purple', 'dav-purple'), ('dav-lime', 'dav-lime'), ('dav-cyan', 'dav-cyan'), ('dav-caramel', 'dav-caramel'), ('dav-mandarin', 'dav-mandarin'), ('dav-brown', 'dav-brown')], max_length=20),
+        ),
+    ]
diff --git a/dav_events/models/eventstatus.py b/dav_events/models/eventstatus.py
index 90b255e..af7f5ce 100644
--- a/dav_events/models/eventstatus.py
+++ b/dav_events/models/eventstatus.py
@@ -13,6 +13,12 @@ BOOTSTRAP_CONTEXT_CHOICES = (
     ('warning', 'warning'),
     ('danger', 'danger'),
     ('black', 'black'),
+    ('dav-purple', 'dav-purple'),
+    ('dav-lime', 'dav-lime'),
+    ('dav-cyan', 'dav-cyan'),
+    ('dav-caramel', 'dav-caramel'),
+    ('dav-mandarin', 'dav-mandarin'),
+    ('dav-brown', 'dav-brown'),
 )
 
 
diff --git a/dav_events/templates/dav_events/emails/event_canceled.txt b/dav_events/templates/dav_events/emails/event_canceled.txt
new file mode 100644
index 0000000..5e7423e
--- /dev/null
+++ b/dav_events/templates/dav_events/emails/event_canceled.txt
@@ -0,0 +1,14 @@
+Hallo {{ recipient.first_name }},
+
+{{ editor.get_full_name|default:'Jemand' }} hat die folgende Veranstaltung abgesagt:
+  {{ event }}
+
+Link zur Veranstaltung:
+  {{ base_url }}{{ event.get_absolute_url }}
+
+Ausschreibung:
+==============
+{{ event.render_as_text }}{% if internal_note %}
+Bearbeitungshinweis:
+====================
+{{ internal_note }}{% endif %}
\ No newline at end of file
diff --git a/dav_events/templates/dav_events/event_detail.html b/dav_events/templates/dav_events/event_detail.html
index 21ef44e..b2865d7 100644
--- a/dav_events/templates/dav_events/event_detail.html
+++ b/dav_events/templates/dav_events/event_detail.html
@@ -146,6 +146,28 @@
             {% trans 'Veröffentlichung bestätigen' %}
         </a>
         {% endif %}
+        {% if has_permission_realize and is_started and not is_canceled %}
+        <a id="btn-realize" class="btn btn-sm {% if not is_realized %}btn-dav-lime{% else %}btn-default disabled{% endif %}"
+           href="{% url 'dav_events:updatestatus' event.pk 'realized' %}">
+            {% if is_realized %}
+            {% bootstrap_icon 'check' %}&thinsp;
+            {% else %}
+            {% bootstrap_icon 'unchecked' %}&thinsp;
+            {% endif %}
+            {% trans 'Durchgeführt' %}
+        </a>
+        {% endif %}
+        {% if has_permission_cancel and is_submitted and not is_realized %}
+        <a id="btn-cancel" class="btn btn-sm {% if not is_canceled %}btn-dav-mandarin{% else %}btn-default disabled{% endif %}"
+           href="{% url 'dav_events:updatestatus' event.pk 'canceled' %}">
+            {% if is_canceled %}
+            {% bootstrap_icon 'check' %}&thinsp;
+            {% else %}
+            {% bootstrap_icon 'unchecked' %}&thinsp;
+            {% endif %}
+            {% trans 'Abgesagt' %}
+        </a>
+        {% endif %}
         {% if has_permission_clear %}
         <a id="btn-confirmclearance" class="btn btn-sm {% if not is_cleared %}btn-black{% else %}btn-default disabled{% endif %}"
            href="{% url 'dav_events:updatestatus' event.pk 'cleared' %}">
diff --git a/dav_events/templates/dav_events/event_registrations.html b/dav_events/templates/dav_events/event_registrations.html
index 531557e..9343c60 100644
--- a/dav_events/templates/dav_events/event_registrations.html
+++ b/dav_events/templates/dav_events/event_registrations.html
@@ -182,8 +182,10 @@
                                 <strong>{% trans 'Anmeldestatus' %}:</strong>
                                 {% if not event.registration_required %}
                                     <span class="label label-success">{% trans 'Anmeldung nicht erforderlich' %}</span>
-                                {% elif is_done %}
-                                    <span class="label label-default">{% trans 'Veranstaltung beendet' %}</span>
+                                {% elif is_canceled %}
+                                    <span class="label label-dav-mandarin">{% trans 'Veranstaltung abgesagt' %}</span>
+                                {% elif is_realized or is_expired %}
+                                    <span class="label label-dav-lime">{% trans 'Veranstaltung beendet' %}</span>
                                 {% elif event.registration_closed %}
                                     <span class="label label-danger">{% trans 'Anmeldung geschlossen' %}</span>
                                 {% elif event.is_deadline_expired %}
diff --git a/dav_events/templates/dav_events/event_update_form.html b/dav_events/templates/dav_events/event_update_form.html
index 151b60c..7c72115 100644
--- a/dav_events/templates/dav_events/event_update_form.html
+++ b/dav_events/templates/dav_events/event_update_form.html
@@ -54,7 +54,17 @@
 <form action="" method="post">
     {% csrf_token %}
 
-    {% if is_expired %}
+    {% if is_realized %}
+    <div class="alert alert-info alert-dismissible" role="alert">
+        <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+        {% trans 'Diese Veranstaltung wurde bereits durchgeführt.' %}
+    </div>
+    {% elif is_canceled %}
+    <div class="alert alert-info alert-dismissible" role="alert">
+        <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+        {% trans 'Diese Veranstaltung ist abgesagt.' %}
+    </div>
+    {% elif is_expired %}
     <div class="alert alert-info alert-dismissible" role="alert">
         <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
         {% trans 'Diese Veranstaltung ist bereits ausgelaufen.' %}
diff --git a/dav_events/views/events.py b/dav_events/views/events.py
index 8946fcb..c6711c9 100644
--- a/dav_events/views/events.py
+++ b/dav_events/views/events.py
@@ -151,6 +151,8 @@ class EventDetailView(EventPermissionMixin, generic.DetailView):
         context['has_permission_submit'] = self.has_permission('submit', obj)
         context['has_permission_accept'] = self.has_permission('accept', obj)
         context['has_permission_publish'] = self.has_permission('publish', obj)
+        context['has_permission_cancel'] = self.has_permission('cancel', obj)
+        context['has_permission_realize'] = self.has_permission('realize', obj)
         context['has_permission_clear'] = self.has_permission('clear', obj)
         context['has_permission_update'] = self.has_permission('update', obj)
         context['is_submitted'] = obj.workflow.has_reached_status('submitted')
@@ -159,6 +161,10 @@ class EventDetailView(EventPermissionMixin, generic.DetailView):
         context['is_publishing_any'] = obj.workflow.has_reached_status('publishing*')
         context['is_published'] = obj.workflow.has_reached_status('published')
         context['is_published_any'] = obj.workflow.has_reached_status('published*')
+        context['is_started'] = obj.first_day <= datetime.date.today()
+        context['is_expired'] = obj.workflow.has_reached_status('expired')
+        context['is_canceled'] = obj.workflow.has_reached_status('canceled')
+        context['is_realized'] = obj.workflow.has_reached_status('realized')
         context['is_cleared'] = obj.workflow.has_reached_status('cleared')
         return context
 
@@ -212,7 +218,9 @@ class EventRegistrationsView(EventPermissionMixin, generic.DetailView):
         context['has_permission_update_participants'] = self.has_permission('update-participants', event)
         context['has_permission_payment'] = self.has_permission('payment', event)
         context['is_published_any'] = event.workflow.has_reached_status('published*')
-        context['is_done'] = event.workflow.has_reached_status('expired')
+        context['is_expired'] = event.workflow.has_reached_status('expired')
+        context['is_canceled'] = event.workflow.has_reached_status('canceled')
+        context['is_realized'] = event.workflow.has_reached_status('realized')
 
         participants = event.participants.all()
         context['participants'] = participants
@@ -527,6 +535,12 @@ class EventUpdateStatusView(EventPermissionMixin, generic.DetailView):
         elif status.startswith('publish'):
             if not self.has_permission('publish', event):
                 raise PermissionDenied(status)
+        elif status.startswith('cancel'):
+            if not self.has_permission('cancel', event):
+                raise PermissionDenied(status)
+        elif status.startswith('realize'):
+            if not self.has_permission('realize', event):
+                raise PermissionDenied(status)
         elif status.startswith('clear'):
             if not self.has_permission('clear', event):
                 raise PermissionDenied(status)
@@ -540,6 +554,10 @@ class EventUpdateStatusView(EventPermissionMixin, generic.DetailView):
                 message = _(u'Veranstaltung ist noch nicht eingereicht.')
             elif return_code == 'not-accepted':
                 message = _(u'Veranstaltung ist noch nicht freigegeben.')
+            elif return_code == 'already-realized':
+                message = _(u'Veranstaltung wurde bereits durchgeführt.')
+            elif return_code == 'not-started':
+                message = _(u'Veranstaltung hat noch nicht begonnen.')
             messages.error(request, message)
             return HttpResponseRedirect(event.get_absolute_url())
 
@@ -563,6 +581,10 @@ class EventUpdateStatusView(EventPermissionMixin, generic.DetailView):
             messages.success(request, _(u'Veranstaltung freigegeben.'))
         elif status.startswith('publish'):
             messages.success(request, _(u'Veröffentlichung registriert.'))
+        elif status.startswith('cancel'):
+            messages.success(request, _(u'Absage vermerkt.'))
+        elif status.startswith('realize'):
+            messages.success(request, _(u'Durchführung vermerkt.'))
         elif status.startswith('clear'):
             messages.success(request, _(u'Abrechnung vermerkt.'))
         else:
@@ -600,10 +622,12 @@ class EventUpdateView(EventPermissionMixin, generic.UpdateView):
         context['has_permission_accept'] = self.has_permission('accept', obj)
         context['has_permission_update'] = self.has_permission('update', obj)
         context['has_permission_publish'] = self.has_permission('publish', obj)
-        context['is_expired'] = obj.workflow.has_reached_status('expired')
+        context['is_accepted'] = obj.workflow.has_reached_status('accepted')
         context['is_publishing'] = obj.workflow.has_reached_status('publishing')
         context['is_publishing_any'] = obj.workflow.has_reached_status('publishing*')
-        context['is_accepted'] = obj.workflow.has_reached_status('accepted')
+        context['is_expired'] = obj.workflow.has_reached_status('expired')
+        context['is_canceled'] = obj.workflow.has_reached_status('canceled')
+        context['is_realized'] = obj.workflow.has_reached_status('realized')
 
         if 'form' in kwargs and kwargs['form'].errors:
             context['decollapseAllForms'] = True
diff --git a/dav_events/workflow.py b/dav_events/workflow.py
index 499b09b..c35272c 100644
--- a/dav_events/workflow.py
+++ b/dav_events/workflow.py
@@ -31,6 +31,8 @@ DEFAULT_EVENT_STATI = {
     'published_web': (79, _(u'Veröffentlicht (Web)'), 'success'),
     'published': (80, _(u'Veröffentlicht'), 'success'),
     'expired': (100, _(u'Ausgelaufen'), None),
+    'canceled': (101, _(u'Abgesagt'), 'dav-mandarin'),
+    'realized': (102, _(u'Durchgeführt'), 'dav-lime'),
     'cleared': (110, _(u'Abgerechnet'), 'black'),
 }
 
@@ -216,6 +218,24 @@ class BasicWorkflow(object):
                 valid = False
                 return_code = 'not-accepted'
                 message = u'Event is not accepted.'
+        elif code.startswith('cancel'):
+            if not self.has_reached_status('submitted'):
+                valid = False
+                return_code = 'not-submitted'
+                message = u'Event is not submitted.'
+            elif self.has_reached_status('realized'):
+                valid = False
+                return_code = 'already-realized'
+                message = u'Event was already realized.'
+        elif code.startswith('realize'):
+            if event.first_day <= today:
+                valid = False
+                return_code = 'not-started'
+                message = u'Event has not begun.'
+            elif not self.has_reached_status('accepted'):
+                valid = False
+                return_code = 'not-accepted'
+                message = u'Event is not accepted.'
 
         if callback is not None:
             callback(valid, return_code, message, *args, **kwargs)
@@ -400,6 +420,16 @@ class BasicWorkflow(object):
                     email = emails.EventToPublishFacebookMail(recipient=recipient, event=event, editor=updater,
                                                               confirm_publication_action=action)
                     email.send()
+        elif flag.status.code == 'canceled':
+            # Who should be informed about the cancelation?
+            recipients = [event.owner]
+            recipients += get_users_by_role('manager_super')
+            recipients += get_users_by_role('office')
+
+            for recipient in recipients:
+                if recipient.email and recipient.email != updater.email:
+                    email = emails.EventCanceledMail(recipient=recipient, event=event, editor=updater)
+                    email.send()
 
     #
     # Permissions
@@ -432,6 +462,16 @@ class BasicWorkflow(object):
         elif permission == 'publish':
             if has_role(user, 'publisher'):
                 return True
+        elif permission == 'cancel':
+            if user == event.owner:
+                return True
+            if has_role(user, 'manager_super'):
+                return True
+            if has_role(user, 'office'):
+                return True
+        elif permission == 'realize':
+            if user == event.owner:
+                return True
         elif permission == 'clear':
             if has_role(user, 'manager_super'):
                 return True