diff --git a/calsocial/models.py b/calsocial/models.py
index 75e4c8c..e36ce0f 100644
--- a/calsocial/models.py
+++ b/calsocial/models.py
@@ -70,6 +70,18 @@ class NotificationAction(Enum):
     #: A user has been invited to an event
     invite = 2
 
+    def __hash__(self):
+        return Enum.__hash__(self)
+
+    def __eq__(self, other):
+        if isinstance(other, str):
+            return self.name.lower() == other.lower()  # pylint: disable=no-member
+
+        if isinstance(other, (int, float)):
+            return self.value == other
+
+        return Enum.__eq__(self, other)
+
 
 NOTIFICATION_ACTION_MESSAGES = {
     NotificationAction.follow: (_('%(actor)s followed you'), _('%(actor)s followed %(item)s')),
@@ -156,6 +168,47 @@ RESPONSE_VISIBILITY_TRANSLATIONS = {
 }
 
 
+class EventAvailability(Enum):
+    """Enumeration of event availabilities
+    """
+
+    free = 0
+    busy = 1
+
+    def __hash__(self):
+        return Enum.__hash__(self)
+
+    def __eq__(self, other):
+        if isinstance(other, str):
+            return self.name.lower() == other.lower()  # pylint: disable=no-member
+
+        if isinstance(other, (int, float)):
+            return self.value == other
+
+        return Enum.__eq__(self, other)
+
+
+class UserAvailability(Enum):
+    """Enumeration of user availabilities
+    """
+
+    free = 0
+    busy = 1
+    tentative = 2
+
+    def __hash__(self):
+        return Enum.__hash__(self)
+
+    def __eq__(self, other):
+        if isinstance(other, str):
+            return self.name.lower() == other.lower()  # pylint: disable=no-member
+
+        if isinstance(other, (int, float)):
+            return self.value == other
+
+        return Enum.__eq__(self, other)
+
+
 class SettingsProxy:
     """Proxy object to get settings for a user
     """