diff --git a/ui/src/pages/Records.jsx b/ui/src/pages/Records.jsx
index b33ca55..846a18f 100644
--- a/ui/src/pages/Records.jsx
+++ b/ui/src/pages/Records.jsx
@@ -8,7 +8,12 @@ function formatVal(val) {
   const s = String(val)
   if (DATE_RE.test(s)) {
     const d = new Date(s)
-    if (!isNaN(d)) return d.toLocaleDateString(undefined, { year: '2-digit', month: 'short', day: 'numeric' })
+    if (!isNaN(d)) {
+      const y = d.getUTCFullYear()
+      const m = String(d.getUTCMonth() + 1).padStart(2, '0')
+      const day = String(d.getUTCDate()).padStart(2, '0')
+      return `${y}-${m}-${day}`
+    }
   }
   return s
 }