diff --git a/app/models/concerns/procedure_stats_concern.rb b/app/models/concerns/procedure_stats_concern.rb
index cbe89c5a8..146925ea1 100644
--- a/app/models/concerns/procedure_stats_concern.rb
+++ b/app/models/concerns/procedure_stats_concern.rb
@@ -52,7 +52,12 @@ module ProcedureStatsConcern
       # rubocop:disable Style/HashTransformValues
       dossier_state_values
         .map do |state|
-          { name: state, data: chart_data.where(state: state).group_by_week { |dossier| dossier.traitements.first.processed_at }.map { |k, v| [k, v.count] }.to_h }
+          {
+            name: state,
+            data: chart_data .where(state: state) .group_by_week do |dossier|
+              dossier.traitements.first.processed_at
+            end.map { |k, v| [k, v.count] }.to_h.transform_keys { |week| pretty_week(week) }
+          }
           # rubocop:enable Style/HashTransformValues
         end
     end
@@ -104,4 +109,8 @@ module ProcedureStatsConcern
   def pretty_month(month)
     I18n.l(month, format: "%B %Y")
   end
+
+  def pretty_week(week)
+    I18n.l(week, format: '%d %b')
+  end
 end