diff --git a/qutebrowser/completion/models/miscmodels.py b/qutebrowser/completion/models/miscmodels.py
index 0803f3508..36e334955 100644
--- a/qutebrowser/completion/models/miscmodels.py
+++ b/qutebrowser/completion/models/miscmodels.py
@@ -280,12 +280,14 @@ def undo(*, info):
     """A model to complete undo entries."""
     tabbed_browser = objreg.get('tabbed-browser', scope='window',
                                 window=info.win_id)
-    model = completionmodel.CompletionModel(column_widths=(6, 94, 0))
+    model = completionmodel.CompletionModel(column_widths=(6, 84, 10))
+    timestamp_format = config.val.completion.timestamp_format
 
     entries = [
         (
             str(idx),
-            ', '.join(entry.url.toDisplayString() for entry in group)
+            ', '.join(entry.url.toDisplayString() for entry in group),
+            group[-1].created_at.strftime(timestamp_format)
         )
         for idx, group in
         enumerate(reversed(tabbed_browser.undo_stack), start=1)
diff --git a/qutebrowser/mainwindow/tabbedbrowser.py b/qutebrowser/mainwindow/tabbedbrowser.py
index b60de50dc..0f9cafac0 100644
--- a/qutebrowser/mainwindow/tabbedbrowser.py
+++ b/qutebrowser/mainwindow/tabbedbrowser.py
@@ -23,6 +23,7 @@ import collections
 import functools
 import weakref
 import typing
+import datetime
 
 import attr
 from PyQt5.QtWidgets import QSizePolicy, QWidget, QApplication
@@ -47,6 +48,7 @@ class _UndoEntry:
     history = attr.ib()
     index = attr.ib()
     pinned = attr.ib()
+    created_at = attr.ib(attr.Factory(datetime.datetime.now))
 
 
 class TabDeque:
diff --git a/tests/unit/completion/test_models.py b/tests/unit/completion/test_models.py
index f105d2b8a..e602f0ab6 100644
--- a/tests/unit/completion/test_models.py
+++ b/tests/unit/completion/test_models.py
@@ -1269,11 +1269,14 @@ def test_forward_completion(tab_with_history, info):
 def test_undo_completion(tabbed_browser_stubs, info):
     """Test :undo completion."""
     entry1 = tabbedbrowser._UndoEntry(url=QUrl('https://example.org/'),
-                                      history=None, index=None, pinned=None)
+                                      history=None, index=None, pinned=None,
+                                      created_at=datetime(2020, 1, 1))
     entry2 = tabbedbrowser._UndoEntry(url=QUrl('https://example.com/'),
-                                      history=None, index=None, pinned=None)
+                                      history=None, index=None, pinned=None,
+                                      created_at=datetime(2020, 1, 2))
     entry3 = tabbedbrowser._UndoEntry(url=QUrl('https://example.net/'),
-                                      history=None, index=None, pinned=None)
+                                      history=None, index=None, pinned=None,
+                                      created_at=datetime(2020, 1, 2))
 
     # Most recently closed is at the end
     tabbed_browser_stubs[0].undo_stack = [
@@ -1288,7 +1291,11 @@ def test_undo_completion(tabbed_browser_stubs, info):
     # undo stack.
     _check_completions(model, {
         "Closed tabs": [
-            ("1", "https://example.com/, https://example.net/", None),
-            ("2", "https://example.org/", None),
+            ("1",
+             "https://example.com/, https://example.net/",
+             "2020-01-02 00:00"),
+            ("2",
+             "https://example.org/",
+             "2020-01-01 00:00"),
         ],
     })