diff --git a/fet2020/members/models.py b/fet2020/members/models.py
index b10fa292..855c83d1 100644
--- a/fet2020/members/models.py
+++ b/fet2020/members/models.py
@@ -158,6 +158,12 @@ class JobGroup(models.Model):
     def __str__(self):
         return self.name
 
+    def save(self, *args, **kwargs):
+        if not self.slug:
+            self.slug = self.shortterm
+
+        super().save(*args, **kwargs)
+
 
 class Job(models.Model):
     name = models.CharField(max_length=128)
diff --git a/fet2020/posts/models.py b/fet2020/posts/models.py
index e5d1fe34..9ffbcbca 100644
--- a/fet2020/posts/models.py
+++ b/fet2020/posts/models.py
@@ -219,14 +219,6 @@ class Event(Post):
         verbose_name = "Event"
         verbose_name_plural = "Events"
 
-    @property
-    def event_start_month(self):
-        return self.event_start.strftime("%b")
-
-    @property
-    def event_start_day(self):
-        return self.event_start.strftime("%d")
-
     def clean(self):
         if self.event_end is None or self.event_start is None:
             raise ValidationError(_('Das Datum des Events fehlt.'))