diff --git a/web/src/components/overlay/ReviewActivityCalendar.tsx b/web/src/components/overlay/ReviewActivityCalendar.tsx
index a0ffd0528..10617d3c9 100644
--- a/web/src/components/overlay/ReviewActivityCalendar.tsx
+++ b/web/src/components/overlay/ReviewActivityCalendar.tsx
@@ -50,7 +50,7 @@ export default function ReviewActivityCalendar({
         }
 
         const parts = date.split("-");
-        const cal = new TZDate(date, timezone);
+        const cal = new TZDate(date + "T00:00:00", timezone);
 
         cal.setFullYear(
           parseInt(parts[0]),
@@ -70,7 +70,7 @@ export default function ReviewActivityCalendar({
         }
 
         const parts = date.split("-");
-        const cal = new TZDate(date, timezone);
+        const cal = new TZDate(date + "T00:00:00", timezone);
 
         cal.setFullYear(
           parseInt(parts[0]),
diff --git a/web/src/views/system/StorageMetrics.tsx b/web/src/views/system/StorageMetrics.tsx
index c24230d38..a2de81394 100644
--- a/web/src/views/system/StorageMetrics.tsx
+++ b/web/src/views/system/StorageMetrics.tsx
@@ -80,7 +80,7 @@ export default function StorageMetrics({
   const formattedEarliestDate = useFormattedTimestamp(
     earliestDate || 0,
     format,
-    timezone,
+    "UTC", // timezone is already converted from recordings summary endpoint
   );
 
   if (!cameraStorage || !stats || !totalStorage || !config) {