diff --git a/boards/models/post.py b/boards/models/post.py
--- a/boards/models/post.py
+++ b/boards/models/post.py
@@ -163,6 +163,7 @@ class PostManager(models.Manager):
 
             for thread in old_threads:
                 thread.archived = True
+                thread.last_edit_time = timezone.now()
                 thread.save()
 
     def connect_replies(self, post):
diff --git a/boards/templates/boards/archive.html b/boards/templates/boards/archive.html
--- a/boards/templates/boards/archive.html
+++ b/boards/templates/boards/archive.html
@@ -62,7 +62,7 @@
                     <span class="title">{{ thread.op.title }}</span>
                     <a class="post_id" href="{% url 'thread' thread.op.id %}"
                     > ({{ thread.op.id }})</a>
-                    [{{ thread.op.pub_time }}] — [{{ thread.thread.bump_time }}]
+                    [{{ thread.op.pub_time }}] — [{{ thread.thread.last_edit_time }}]
 
                     [<a class="link" href="
                     {% url 'thread' thread.op.id %}">{% trans "Open" %}</a>]