diff --git a/frigate/api/review.py b/frigate/api/review.py
index b30c64d109..977a0aa94a 100644
--- a/frigate/api/review.py
+++ b/frigate/api/review.py
@@ -176,7 +176,6 @@ async def review_summary(
 
     hour_modifier, minute_modifier, seconds_offset = get_tz_modifiers(params.timezone)
     day_ago = (datetime.datetime.now() - datetime.timedelta(hours=24)).timestamp()
-    month_ago = (datetime.datetime.now() - datetime.timedelta(days=30)).timestamp()
 
     cameras = params.cameras
     labels = params.labels