diff --git a/apps/settings/models.py b/apps/settings/models.py
index b39408098..98964ad0e 100644
--- a/apps/settings/models.py
+++ b/apps/settings/models.py
@@ -7,6 +7,7 @@ from django.core.files.uploadedfile import InMemoryUploadedFile
 from django.db import models
 from django.db.utils import ProgrammingError, OperationalError
 from django.utils.translation import gettext_lazy as _
+from rest_framework.utils.encoders import JSONEncoder
 
 from common.db.models import JMSBaseModel
 from common.utils import signer, get_logger
@@ -63,7 +64,7 @@ class Setting(models.Model):
     @cleaned_value.setter
     def cleaned_value(self, item):
         try:
-            v = json.dumps(item)
+            v = json.dumps(item, cls=JSONEncoder)
             if self.encrypted:
                 v = signer.sign(v)
             self.value = v
diff --git a/apps/settings/serializers/feature.py b/apps/settings/serializers/feature.py
index 4b219373d..3deb49942 100644
--- a/apps/settings/serializers/feature.py
+++ b/apps/settings/serializers/feature.py
@@ -1,10 +1,11 @@
 import uuid
-
+from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 from rest_framework import serializers
 
 from assets.const import Protocol
 from common.serializers.fields import EncryptedField
+from common.utils import date_expired_default
 
 __all__ = [
     'AnnouncementSettingSerializer', 'OpsSettingSerializer',
@@ -21,6 +22,8 @@ class AnnouncementSerializer(serializers.Serializer):
         required=False, allow_null=True, allow_blank=True,
         label=_("More Link"), default='',
     )
+    DATE_START = serializers.DateTimeField(default=timezone.now, label=_("Date start"))
+    DATE_END = serializers.DateTimeField(default=date_expired_default, label=_("Date end"))
 
     def to_representation(self, instance):
         defaults = {'ID': '', 'SUBJECT': '', 'CONTENT': '', 'LINK': '', 'ENABLED': False}