diff --git a/docs/_docs/collections.md b/docs/_docs/collections.md
index 7701570d..67b80c3e 100644
--- a/docs/_docs/collections.md
+++ b/docs/_docs/collections.md
@@ -129,7 +129,9 @@ help you control the output url for the entire collection.
 
 ## Custom Sorting of Documents
 
-By default, documents in a collection are sorted by their paths. But you can control this sorting via the collection's metadata.
+By default, two documents in a collection are sorted by their `date` attribute when both of them have the `date` key in their front matter. However, if either or both documents do not have the `date` key in their front matter, they are sorted by their respective paths.
+
+You can control this sorting via the collection's metadata.
 
 ### Sort By Front Matter Key