diff --git a/plugins/discourse-local-dates/assets/javascripts/discourse-local-dates.js b/plugins/discourse-local-dates/assets/javascripts/discourse-local-dates.js
index 8eef14aa20e..9539dc47885 100644
--- a/plugins/discourse-local-dates/assets/javascripts/discourse-local-dates.js
+++ b/plugins/discourse-local-dates/assets/javascripts/discourse-local-dates.js
@@ -27,7 +27,10 @@
       }
 
       var previews = options.timezones.split("|").map(function(timezone) {
-        var dateTime = relativeTime.tz(timezone).format("LLL");
+        var dateTime = relativeTime
+          .tz(timezone)
+          .format(options.format || "LLL");
+
         var timezoneParts = _formatTimezone(timezone);
 
         if (dateTime.match(/TZ/)) {
diff --git a/plugins/discourse-local-dates/spec/lib/pretty_text_spec.rb b/plugins/discourse-local-dates/spec/lib/pretty_text_spec.rb
index f81f8084f99..d76857b9ab4 100644
--- a/plugins/discourse-local-dates/spec/lib/pretty_text_spec.rb
+++ b/plugins/discourse-local-dates/spec/lib/pretty_text_spec.rb
@@ -4,15 +4,15 @@ describe PrettyText do
   it 'supports inserting date' do
     freeze_time
     cooked = PrettyText.cook <<~MD
-      [date=2018-05-08 time=22:00 format=LLL timezones="Europe/Paris|America/Los_Angeles"]
+      [date=2018-05-08 time=22:00 format="L LTS" timezones="Europe/Paris|America/Los_Angeles"]
     MD
 
     expect(cooked).to include('class="discourse-local-date"')
     expect(cooked).to include('data-date="2018-05-08"')
-    expect(cooked).to include('data-format="LLL"')
+    expect(cooked).to include('data-format="L LTS"')
     expect(cooked).to include('data-timezones="Europe/Paris|America/Los_Angeles"')
-    expect(cooked).to include('May 8, 2018 3:00 PM (America: Los Angeles)')
-    expect(cooked).to include('May 9, 2018 12:00 AM (Europe: Paris)')
+    expect(cooked).to include('05/08/2018 3:00:00 PM (America: Los Angeles)')
+    expect(cooked).to include('05/09/2018 12:00:00 AM (Europe: Paris)')
   end
 
   it 'uses a simplified syntax in emails' do