diff --git a/.changeset/spicy-elephants-develop.md b/.changeset/spicy-elephants-develop.md
new file mode 100644
index 00000000..a980d025
--- /dev/null
+++ b/.changeset/spicy-elephants-develop.md
@@ -0,0 +1,6 @@
+---
+'@hyperdx/app': patch
+---
+
+Fix: Don't crash session replay player when playback timestamp is not a valid
+date
diff --git a/packages/app/src/Playbar.tsx b/packages/app/src/Playbar.tsx
index 84bf396a..7817a9ae 100644
--- a/packages/app/src/Playbar.tsx
+++ b/packages/app/src/Playbar.tsx
@@ -28,7 +28,12 @@ function formatTs({
     const seconds = Math.floor((value / 1000) % 60);
     return `${minutes}:${seconds < 10 ? '0' : ''}${seconds}`;
   } else {
-    return format(new Date(ts), 'hh:mm:ss a');
+    try {
+      return format(new Date(ts), 'hh:mm:ss a');
+    } catch (err) {
+      console.error(err, ts);
+      return '--:--';
+    }
   }
 }