diff --git a/blog.md b/blog.md
index 15c09039578c4f6cdb3f5c9b0fd0a93ace9d3753..2725be7ac5fc658e5c76bd02a20e4a3be49171a8 100644
--- a/blog.md
+++ b/blog.md
@@ -34,7 +34,7 @@ Articles are put into the queue every second Friday. An article from
 the queue is posted every second Tuesday. For the current schedule see this
 Google calendar:
 
-https://calendar.google.com/calendar/embed?src=olindata.com_al1t8ln0iqmolkkd9diqi4jm3c%40group.calendar.google.com&ctz=Europe%2FAmsterdam
+<https://calendar.google.com/calendar/embed?src=olindata.com_al1t8ln0iqmolkkd9diqi4jm3c%40group.calendar.google.com>
 
 The current maintainer of olindata.com/blog is oliver at olindata.com.
 See [internal/www](https://gitlab.olindata.com/internal/www) for more