diff --git a/app/views/pages/home/_all_courses.html.haml b/app/views/pages/home/_all_courses.html.haml
index 5153d86..ebb3ab8 100644
--- a/app/views/pages/home/_all_courses.html.haml
+++ b/app/views/pages/home/_all_courses.html.haml
@@ -27,11 +27,11 @@
               %td.time
                 - if course.start_time
                   = l(course.start_time,
-                    format: '%H:%M')
+                    format: :clock_wordless)
                 = "-"
                 - if course.end_time
                   = l(course.end_time,
-                    format: '%H:%M')
+                    format: :clock_wordless)
               %td.style
                 = link_to course.style do
                   = course.style.name
diff --git a/app/views/styles/_courses.html.haml b/app/views/styles/_courses.html.haml
index ead8d41..66bd29b 100644
--- a/app/views/styles/_courses.html.haml
+++ b/app/views/styles/_courses.html.haml
@@ -15,11 +15,11 @@
       %td.time
         - if course.start_time
           = l(course.start_time,
-            format: '%H:%m')
+            format: :clock_wordless)
         = "-"
         - if course.end_time
           = l(course.end_time,
-            format: '%M:%m')
+            format: :clock_wordless)
       %td.place
         = course.place.name
         %i
diff --git a/config/locales/datetime.de.yml b/config/locales/datetime.de.yml
index 9774af8..7fb8a51 100644
--- a/config/locales/datetime.de.yml
+++ b/config/locales/datetime.de.yml
@@ -45,6 +45,7 @@ de:
           other: "%{count} Jahren"
   time:
     formats:
+      clock_wordless: '%H:%M'
       devise:
         mailer:
           invitation_instructions: