diff --git a/web/pdf_document_properties.js b/web/pdf_document_properties.js
index dd386ffec7517..3448f439b88cd 100644
--- a/web/pdf_document_properties.js
+++ b/web/pdf_document_properties.js
@@ -329,7 +329,9 @@ class PDFDocumentProperties {
   async #parseDate(inputDate) {
     const dateObj = PDFDateString.toDateObject(inputDate);
     return dateObj
-      ? this.l10n.get("pdfjs-document-properties-date-time-string", { dateObj })
+      ? this.l10n.get("pdfjs-document-properties-date-time-string", {
+          dateObj: dateObj.valueOf(),
+        })
       : undefined;
   }