diff --git a/app/controllers/stats_controller.rb b/app/controllers/stats_controller.rb
index 196c292d6..5a7579fa7 100644
--- a/app/controllers/stats_controller.rb
+++ b/app/controllers/stats_controller.rb
@@ -129,9 +129,9 @@ class StatsController < ApplicationController
 
   def satisfaction_usagers
     legend = {
-      Feedback.ratings.fetch(:happy)    => "Satisfaits",
-      Feedback.ratings.fetch(:neutral)  => "Neutres",
-      Feedback.ratings.fetch(:unhappy)  => "Mécontents"
+      Feedback.ratings.fetch(:unhappy) => "Mécontents",
+      Feedback.ratings.fetch(:neutral) => "Neutres",
+      Feedback.ratings.fetch(:happy)   => "Satisfaits"
     }
 
     number_of_weeks = 6
@@ -139,7 +139,7 @@ class StatsController < ApplicationController
       .group_by_week(:created_at, last: number_of_weeks, current: false)
       .count
 
-    Feedback.ratings.values.map do |rating|
+    legend.keys.map do |rating|
       data = Feedback
         .where(rating: rating)
         .group_by_week(:created_at, last: number_of_weeks, current: false)
diff --git a/app/models/concerns/trusted_device_concern.rb b/app/models/concerns/trusted_device_concern.rb
index 5aff22882..9928adfa1 100644
--- a/app/models/concerns/trusted_device_concern.rb
+++ b/app/models/concerns/trusted_device_concern.rb
@@ -14,11 +14,15 @@ module TrustedDeviceConcern
 
   def trusted_device?
     trusted_device_cookie.present? &&
-      Time.zone.now - TRUSTED_DEVICE_PERIOD < JSON.parse(trusted_device_cookie)['created_at']
+      (Time.zone.now - TRUSTED_DEVICE_PERIOD) < trusted_device_cookie_created_at
   end
 
   private
 
+  def trusted_device_cookie_created_at
+    Time.zone.parse(JSON.parse(trusted_device_cookie)['created_at'])
+  end
+
   def trusted_device_cookie
     cookies.encrypted[TRUSTED_DEVICE_COOKIE_NAME]
   end
diff --git a/app/views/shared/dossiers/editable_champs/_datetime.html.haml b/app/views/shared/dossiers/editable_champs/_datetime.html.haml
index 4eb9c2109..a64ad3671 100644
--- a/app/views/shared/dossiers/editable_champs/_datetime.html.haml
+++ b/app/views/shared/dossiers/editable_champs/_datetime.html.haml
@@ -1,4 +1,4 @@
-- parsed_value = champ.value.present? ? Time.zone.parse(champ.value) : Time.zone.now
+- parsed_value = champ.value.present? ? Time.zone.parse(champ.value) : nil
 
 .datetime
-  = form.datetime_select(:value, selected: parsed_value, start_year: 1950, end_year: 2100, minute_step: 5)
+  = form.datetime_select(:value, selected: parsed_value, start_year: 1950, end_year: 2100, minute_step: 5, include_blank: true)
diff --git a/app/views/stats/index.html.haml b/app/views/stats/index.html.haml
index 80b46b8d6..fc10a6309 100644
--- a/app/views/stats/index.html.haml
+++ b/app/views/stats/index.html.haml
@@ -25,8 +25,12 @@
 
       .chart-container
         .chart
-          = line_chart @satisfaction_usagers,
-            colors: ["#15AD70", "#F28900", "rgba(161, 0, 5, 0.9)"]
+          = area_chart @satisfaction_usagers,
+            stacked: true,
+            suffix: ' %',
+            max: 100,
+            library: { plotOptions: { series: { marker: { enabled: true }}}},
+            colors: ["#C31C25", "#F5962A", "#25B177"]
 
     .stat-card.stat-card-half.pull-left
       %span.stat-card-title
diff --git a/config/initializers/chartkick.rb b/config/initializers/chartkick.rb
index 213fa9164..cf507c8be 100644
--- a/config/initializers/chartkick.rb
+++ b/config/initializers/chartkick.rb
@@ -1,5 +1,7 @@
 Chartkick.options = {
   content_for: :charts_js,
   defer: true,
-  colors: ["rgba(61, 149, 236, 1)"]
+  colors: ["rgba(61, 149, 236, 1)"],
+  thousands: ' ',
+  decimal: ','
 }