diff --git a/atom/blog.xml b/atom/blog.xml
index 801e870..46f8b9a 100644
--- a/atom/blog.xml
+++ b/atom/blog.xml
@@ -8,13 +8,13 @@
         <email>baruchel@sdf.org</email>
     </author>
     <rights>CC BY-SA 4.0</rights>
-    <updated>2022-11-05T14:53:19.131349Z</updated>
+    <updated>2022-11-05T14:56:18.520495Z</updated>
     <link href="https://git.sdf.org/baruchel/feeds/raw/branch/master/src/blog.rst" />
     <link href="https://git.sdf.org/baruchel/feeds/raw/branch/master/atom/blog.xml" rel="self" />
     <generator uri="https://git.sdf.org/baruchel/feeds/src/branch/master/rst2atom.py">rst2atom</generator>
 
     <entry>
-        <id>https://git.sdf.org/baruchel/feeds/raw/branch/master/src/blog.rst#initial-entry</id>
+        <id>https://git.sdf.org/baruchel/feeds/raw/branch/master/src/blog.rst#initial-entry_(2022-11-05T00:00:00Z)</id>
         <title>Initial entry</title>
         <updated>2022-11-05T00:00:00Z</updated>
         <content type="xhtml">
diff --git a/rst2atom.py b/rst2atom.py
index c8ef250..926a285 100644
--- a/rst2atom.py
+++ b/rst2atom.py
@@ -86,7 +86,8 @@ def build_entry(d, base_url):
         </content>
     </entry>
         """ % (
-            base_url + "#" + mytitle.lower().replace(" ", "-"),
+            base_url + "#" + mytitle.lower().replace(" ", "-")
+              + "_(" + mydate + ")",
             mytitle, mydate, d
         ))