diff --git a/calendar/templates/event_summary_body.mustache b/calendar/templates/event_summary_body.mustache
index 23946c9668f..948e853de82 100644
--- a/calendar/templates/event_summary_body.mustache
+++ b/calendar/templates/event_summary_body.mustache
@@ -26,7 +26,7 @@
         "eventtype": "open",
     }
 }}
-<div class="container">
+<div>
     <h4>{{#str}} when, core_calendar {{/str}}</h4>
     {{#userdate}} {{timestart}}, {{#str}} strftimerecentfull {{/str}} {{/userdate}}
     <br>
diff --git a/calendar/templates/event_summary_modal.mustache b/calendar/templates/event_summary_modal.mustache
index 18498d79d43..2ae8dd213bd 100644
--- a/calendar/templates/event_summary_modal.mustache
+++ b/calendar/templates/event_summary_modal.mustache
@@ -26,7 +26,7 @@
 }}
 {{< core/modal }}
 {{$footer}}
-<button type="button" class="btn btn-secondary pull-xs-left" data-action="delete">{{#str}} delete {{/str}}</button>
+<button type="button" class="btn btn-secondary" data-action="delete">{{#str}} delete {{/str}}</button>
 <button type="button" class="btn btn-primary" data-action="edit">{{#str}} edit {{/str}}</button>
 {{/footer}}
 {{/ core/modal }}