diff --git a/app/__init__.py b/app/__init__.py
index 4daf81b80..0242fea30 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -334,6 +334,10 @@ def format_date_human(date):
     return get_human_day(date)
 
 
+def format_day_of_week(date):
+    return utc_string_to_aware_gmt_datetime(date).strftime('%A')
+
+
 def _format_datetime_short(datetime):
     return datetime.strftime('%d %B').lstrip('0')
 
@@ -743,6 +747,7 @@ def add_template_filters(application):
         format_date_normal,
         format_date_short,
         format_datetime_relative,
+        format_day_of_week,
         format_delta,
         format_notification_status,
         format_notification_type,
diff --git a/app/templates/views/notifications/notification.html b/app/templates/views/notifications/notification.html
index f422414ea..f2004a6ec 100644
--- a/app/templates/views/notifications/notification.html
+++ b/app/templates/views/notifications/notification.html
@@ -67,7 +67,7 @@
             {{ letter_print_day }}
           </p>
           <p>
-            Estimated delivery date: {{ estimated_letter_delivery_date|string|format_date_short }}
+            Estimated delivery date: {{ estimated_letter_delivery_date|format_day_of_week }} {{ estimated_letter_delivery_date|format_date_short }}
           </p>
         {% endif %}
       {% endif %}
diff --git a/tests/app/main/views/test_notifications.py b/tests/app/main/views/test_notifications.py
index 012ccaa1a..426aeade2 100644
--- a/tests/app/main/views/test_notifications.py
+++ b/tests/app/main/views/test_notifications.py
@@ -202,7 +202,7 @@ def test_notification_page_shows_page_for_letter_notification(
         'Printing starts today at 5:30pm'
     )
     assert normalize_spaces(page.select('main p:nth-of-type(3)')[0].text) == (
-        'Estimated delivery date: 6 January'
+        'Estimated delivery date: Wednesday 6 January'
     )
     assert len(page.select('.letter-postage')) == 1
     assert normalize_spaces(page.select_one('.letter-postage').text) == (
@@ -473,7 +473,9 @@ def test_notification_page_shows_page_for_first_class_letter_notification(
     )
 
     assert normalize_spaces(page.select('main p:nth-of-type(2)')[0].text) == 'Printing starts tomorrow at 5:30pm'
-    assert normalize_spaces(page.select('main p:nth-of-type(3)')[0].text) == 'Estimated delivery date: 5 January'
+    assert normalize_spaces(page.select('main p:nth-of-type(3)')[0].text) == (
+        'Estimated delivery date: Tuesday 5 January'
+    )
     assert normalize_spaces(page.select_one('.letter-postage').text) == (
         'Postage: first class'
     )