diff --git a/engine/apps/api/views/alert_group.py b/engine/apps/api/views/alert_group.py
index f7590152..1c6ce144 100644
--- a/engine/apps/api/views/alert_group.py
+++ b/engine/apps/api/views/alert_group.py
@@ -1,9 +1,7 @@
 import typing
-from datetime import timedelta
 
 from django.core.exceptions import ObjectDoesNotExist
 from django.db.models import Count, Max, Q
-from django.utils import timezone
 from django_filters import rest_framework as filters
 from drf_spectacular.utils import extend_schema, inline_serializer
 from rest_framework import mixins, serializers, status, viewsets
@@ -729,14 +727,9 @@ class AlertGroupView(
         Retrieve a list of valid filter options that can be used to filter alert groups
         """
         api_root = "/api/internal/v1/"
+        default_day_range = 30
 
-        now = timezone.now()
-        week_ago = now - timedelta(days=7)
-
-        default_datetime_range = "{}_{}".format(
-            week_ago.strftime(DateRangeFilterMixin.DATE_FORMAT),
-            now.strftime(DateRangeFilterMixin.DATE_FORMAT),
-        )
+        default_datetime_range = f"now-{default_day_range}d_now"
 
         filter_options = [
             {
diff --git a/grafana-plugin/src/pages/incidents/Incidents.tsx b/grafana-plugin/src/pages/incidents/Incidents.tsx
index 605499f3..cee71fa2 100644
--- a/grafana-plugin/src/pages/incidents/Incidents.tsx
+++ b/grafana-plugin/src/pages/incidents/Incidents.tsx
@@ -307,8 +307,6 @@ class _IncidentsPage extends React.Component<IncidentsPageProps, IncidentsPageSt
 
   renderIncidentFilters() {
     const { query, store } = this.props;
-    const defaultStart = moment().subtract(7, 'days');
-    const defaultEnd = moment().add(1, 'days');
     return (
       <div className={cx('filters')}>
         <RemoteFilters
@@ -323,7 +321,7 @@ class _IncidentsPage extends React.Component<IncidentsPageProps, IncidentsPageSt
             team: [],
             status: [IncidentStatus.Firing, IncidentStatus.Acknowledged],
             mine: false,
-            started_at: `${defaultStart.format('YYYY-MM-DDTHH:mm:ss')}_${defaultEnd.format('YYYY-MM-DDTHH:mm:ss')}`,
+            started_at: 'now-30d_now',
           }}
         />
       </div>