diff --git a/web/src/components/overlay/ReviewActivityCalendar.tsx b/web/src/components/overlay/ReviewActivityCalendar.tsx
index 2d64ca5544..e119870322 100644
--- a/web/src/components/overlay/ReviewActivityCalendar.tsx
+++ b/web/src/components/overlay/ReviewActivityCalendar.tsx
@@ -4,6 +4,7 @@ import { useMemo } from "react";
 import { FaCircle } from "react-icons/fa";
 import { getUTCOffset } from "@/utils/dateUtil";
 import { type DayContentProps } from "react-day-picker";
+import { LAST_24_HOURS_KEY } from "@/types/filter";
 
 type ReviewActivityCalendarProps = {
   reviewSummary?: ReviewSummary;
@@ -32,10 +33,23 @@ export default function ReviewActivityCalendar({
     const unreviewedAlerts: Date[] = [];
 
     Object.entries(reviewSummary).forEach(([date, data]) => {
+      if (date == LAST_24_HOURS_KEY) {
+        return;
+      }
+
+      const parts = date.split("-");
+      const cal = new Date(date);
+
+      cal.setFullYear(
+        parseInt(parts[0]),
+        parseInt(parts[1]) - 1,
+        parseInt(parts[2]),
+      );
+
       if (data.total_alert > data.reviewed_alert) {
-        unreviewedAlerts.push(new Date(date));
+        unreviewedAlerts.push(cal);
       } else if (data.total_detection > data.reviewed_detection) {
-        unreviewedDetections.push(new Date(date));
+        unreviewedDetections.push(cal);
       }
     });
 
diff --git a/web/src/types/filter.ts b/web/src/types/filter.ts
index 88f3c27aea..09ff5b99a6 100644
--- a/web/src/types/filter.ts
+++ b/web/src/types/filter.ts
@@ -8,3 +8,5 @@ export type FilterList = {
   labels?: string[];
   zones?: string[];
 };
+
+export const LAST_24_HOURS_KEY = "last24Hours";
diff --git a/web/src/views/events/EventView.tsx b/web/src/views/events/EventView.tsx
index 2832ab3fd6..a95524e022 100644
--- a/web/src/views/events/EventView.tsx
+++ b/web/src/views/events/EventView.tsx
@@ -49,7 +49,7 @@ import scrollIntoView from "scroll-into-view-if-needed";
 import { Toaster } from "@/components/ui/sonner";
 import { toast } from "sonner";
 import { cn } from "@/lib/utils";
-import { FilterList } from "@/types/filter";
+import { FilterList, LAST_24_HOURS_KEY } from "@/types/filter";
 import { GiSoundWaves } from "react-icons/gi";
 
 type EventViewProps = {
@@ -96,7 +96,7 @@ export default function EventView({
 
     let summary;
     if (filter?.before == undefined) {
-      summary = reviewSummary["last24Hours"];
+      summary = reviewSummary[LAST_24_HOURS_KEY];
     } else {
       const day = new Date(filter.before * 1000);
       const key = `${day.getFullYear()}-${("0" + (day.getMonth() + 1)).slice(-2)}-${("0" + day.getDate()).slice(-2)}`;