diff --git a/app/javascript/packs/public.js b/app/javascript/packs/public.js
index da1f550f..d8a0f4ee 100644
--- a/app/javascript/packs/public.js
+++ b/app/javascript/packs/public.js
@@ -35,6 +35,7 @@ function main() {
 
     [].forEach.call(document.querySelectorAll('time.time-ago'), (content) => {
       const datetime = new Date(content.getAttribute('datetime'));
+      content.title = dateTimeFormat.format(datetime);
       content.textContent = relativeFormat.format(datetime);
     });
   });