diff --git a/doc/source/index.rst b/doc/source/index.rst
index e31a03b413..2e93319354 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -55,9 +55,9 @@ updates.
 
 .. note::
    If a branch is marked as Extended Maintenance, that means individual
-   projects can be in state *Maintained*, *Unmaintained* or *End of Life* on
-   that branch. Please check specific project about its actual status on the
-   given branch.
+   projects can be in state *Maintained*, *Unmaintained*, *Last* or
+   *End of Life* on that branch. Please check specific project about its
+   actual status on the given branch.
 
 .. _Maintenance phases: https://docs.openstack.org/project-team-guide/stable-branches.html#maintenance-phases
 .. _old phases: https://github.com/openstack/project-team-guide/blob/1c837bf0~/doc/source/stable-branches.rst
diff --git a/openstack_releases/cmds/validate.py b/openstack_releases/cmds/validate.py
index 0c2f3a019c..f1b3ab0178 100644
--- a/openstack_releases/cmds/validate.py
+++ b/openstack_releases/cmds/validate.py
@@ -1102,6 +1102,24 @@ def validate_version_numbers(deliv, context):
                         release.version, deliv.series))
             continue
 
+        if release.is_last:
+            LOG.debug('Found new LAST tag {} for {}'.format(
+                release.version, deliv.name))
+            if deliv.is_independent:
+                context.warning(
+                    'LAST tag {} on independent deliverable, branch not validated'.format(
+                        release.version))
+                continue
+            if release.version != "{}-last".format(deliv.series):
+                context.error(
+                    "LAST tag {} should match branch name (e.g {}-last)".format(
+                        release.version, deliv.series))
+            if not deliv.series_info.is_em:
+                context.error(
+                    "LAST tag {} aren't allowed on a series ({}) that are not EM".format(
+                        release.version, deliv.series))
+            continue
+
         for project in release.projects:
 
             if not gitutils.checkout_ref(context.workdir, project.repo.name,
@@ -1303,6 +1321,9 @@ def validate_new_releases_in_open_series(deliv, context):
             elif release.is_em:
                 LOG.debug('Found new EM tag {} for {}'.format(
                     release.version, project.repo))
+            elif release.is_last:
+                LOG.debug('Found new LAST tag {} for {}'.format(
+                    release.version, project.repo))
             else:
                 LOG.debug('Found new version {} for {}'.format(
                     release.version, project.repo))
diff --git a/openstack_releases/deliverable.py b/openstack_releases/deliverable.py
index 85da59a910..0c7201ee4d 100644
--- a/openstack_releases/deliverable.py
+++ b/openstack_releases/deliverable.py
@@ -64,7 +64,9 @@ def _version_sort_key(release):
     # won't have more than 1000 major releases of anything, and I
     # surely hope that is a safe assumption.
     version_string = release['version']
-    if version_string.endswith('-eol') or version_string.endswith('-em'):
+    if version_string.endswith('-eol') or \
+        version_string.endswith('-em') or \
+        version_string.endswith('-last'):
         return _safe_semver('1000.0.0')
     return _safe_semver(version_string)
 
@@ -338,6 +340,10 @@ class Release(object):
     def is_em(self):
         return self.version.endswith('-em')
 
+    @property
+    def is_last(self):
+        return self.version.endswith('-last')
+
     @property
     def em_series(self):
         if self.is_em: