diff --git a/doc/source/conf.py b/doc/source/conf.py
index 8512a052..309847ab 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -61,13 +61,6 @@ html_theme = 'openstackdocs'
 
 # html_static_path = ['static']
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-# So that we can enable "log-a-bug" links from each output HTML page, this
-# variable must be set to a format that includes year, month, day, hours and
-# minutes.
-# html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project
 
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 557a6da6..89a67ec6 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -142,11 +142,6 @@ html_static_path = ['_static']
 # directly to the root of the documentation.
 # html_extra_path = []
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-# html_last_updated_fmt = '%b %d, %Y'
-# html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True