diff --git a/publish.el b/publish.el
index 37a10de..c69b078 100644
--- a/publish.el
+++ b/publish.el
@@ -45,6 +45,7 @@
          :html-postamble nil
          :auto-sitemap t
          :sitemap-filename "index.org"
+         :sitemap-format-entry "%Y-%m-%d %T"
          :sitemap-sort-files anti-chronologically
          :sitemap-title "Blog")
         ("org-config"