diff --git a/src/pretix/presale/templates/pretixpresale/event/fragment_subevent_calendar_week.html b/src/pretix/presale/templates/pretixpresale/event/fragment_subevent_calendar_week.html
index 11fe51b344..9ebcb19f90 100644
--- a/src/pretix/presale/templates/pretixpresale/event/fragment_subevent_calendar_week.html
+++ b/src/pretix/presale/templates/pretixpresale/event/fragment_subevent_calendar_week.html
@@ -18,7 +18,7 @@
         <div class="col-sm-4 col-xs-12 text-center">
             <select name="week" class="form-control">
                 {% for w in weeks %}
-                    <option value="{{ w }}" {% if w == date.isocalendar.1 %}selected{% endif %}>{{ w }}</option>
+                    <option value="{{ w }}" {% if w == date.isocalendar.1 %}selected{% endif %}>{% trans "W" %} {{ w }}</option>
                 {% endfor %}
             </select>
             <select name="year" class="form-control">
diff --git a/src/pretix/presale/templates/pretixpresale/organizers/calendar_week.html b/src/pretix/presale/templates/pretixpresale/organizers/calendar_week.html
index fa59cc463b..0956e2c2b3 100644
--- a/src/pretix/presale/templates/pretixpresale/organizers/calendar_week.html
+++ b/src/pretix/presale/templates/pretixpresale/organizers/calendar_week.html
@@ -45,7 +45,7 @@
             <div class="col-sm-4 col-xs-12 text-center">
                 <select name="week" class="form-control">
                     {% for w in weeks %}
-                        <option value="{{ w }}" {% if w == date.isocalendar.1 %}selected{% endif %}>{{ w }}</option>
+                        <option value="{{ w }}" {% if w == date.isocalendar.1 %}selected{% endif %}>{% trans "W" %} {{ w }}</option>
                     {% endfor %}
                 </select>
                 <select name="year" class="form-control">