diff --git a/README.md b/README.md
index d8bba76..9dcf41e 100644
--- a/README.md
+++ b/README.md
@@ -32,9 +32,9 @@ git pull origin master > /tmp/gitpull_speedie.site # log file
 The blog is handled by `blog.php`. It also generates rss.xml on
 execution if the result differs from the existing file. To
 add new blog posts, add a new Markdown article to /articles.
-You must also create a .md.date and .md.num file for the new page.
-The .md.date contains the date, in YYYY-MM-DD format, and the
-.md.num contains the blog post number, used for sorting.
+You must also create a .md.date file for the new page.
+The .md.date contains the date, in YYYY-MM-DD format. It is
+used for RSS feeds, and for sorting.
 
 ## Contributions