diff --git a/EditSet.tsx b/EditSet.tsx
index 2e69217..30c12de 100644
--- a/EditSet.tsx
+++ b/EditSet.tsx
@@ -42,7 +42,7 @@ export default function EditSet({
           newSet.name,
           newSet.reps,
           newSet.weight,
-          new Date().toUTCString(),
+          new Date().toISOString(),
           newSet.unit || 'kg',
         ],
       );