diff -r dff58e6bea47 -r 75dc1e794cf4 src/notes/api/serializers/core.py
--- a/src/notes/api/serializers/core.py	Wed Jun 21 08:45:29 2017 +0200
+++ b/src/notes/api/serializers/core.py	Wed Jun 21 14:12:45 2017 +0200
@@ -34,7 +34,7 @@
     class Meta:
         model = Session
         fields = (
-            'ext_id', 'version', 'created', 'updated',
+            'ext_id', 'version', 'date', 'created', 'updated',
             'owner', 'title', 'description', 'protocol'
         )
         read_only_fields = ('ext_id', 'version', 'created', 'updated', 'owner')
@@ -48,7 +48,7 @@
     class Meta:
         model = Session
         fields = (
-            'ext_id', 'version', 'created', 'updated',
+            'ext_id', 'version', 'date', 'created', 'updated',
             'owner', 'title', 'description', 'protocol',
             'notes'
         )
@@ -62,7 +62,7 @@
     class Meta:
         model = Session
         fields = (
-            'ext_id', 'version', 'created', 'updated',
+            'ext_id', 'version', 'date', 'created', 'updated',
             'owner', 'title', 'description', 'protocol'
         )
         read_only_fields = ('version', 'created', 'updated', 'owner')