diff --git a/lib/meetup_bot/slack.ex b/lib/meetup_bot/slack.ex
index fb735c6..95b1391 100644
--- a/lib/meetup_bot/slack.ex
+++ b/lib/meetup_bot/slack.ex
@@ -52,7 +52,7 @@ defmodule MeetupBot.Slack do
   end
 
   defp to_bullet_item(meetup) do
-    "• #{Calendar.strftime(meetup.datetime, "%-d %B - %H:%M")} - <#{meetup.event_url}|#{escaped_text(meetup.name)}>"
+    "• #{Calendar.strftime(meetup.datetime, "%a, %-d %B - %H:%M")} - <#{meetup.event_url}|#{escaped_text(meetup.name)}>"
   end
 
   defp escaped_text(text) do
diff --git a/test/slack_test.exs b/test/slack_test.exs
index 57ec7ed..54990b2 100644
--- a/test/slack_test.exs
+++ b/test/slack_test.exs
@@ -22,7 +22,7 @@ defmodule SlackTest do
         },
         {
           "type": "section",
-          "text": {"type": "mrkdwn", "text": "• 28 March - 22:00 - <http://example.com|Elixir |&gt; Meetup>"}
+          "text": {"type": "mrkdwn", "text": "• Thu, 28 March - 22:00 - <http://example.com|Elixir |&gt; Meetup>"}
         }
       ]
     }