diff --git a/app/decorators/dossier_decorator.rb b/app/decorators/dossier_decorator.rb
index e42ba1496..c4ce6b8e7 100644
--- a/app/decorators/dossier_decorator.rb
+++ b/app/decorators/dossier_decorator.rb
@@ -5,11 +5,11 @@ class DossierDecorator < Draper::Decorator
   delegate_all
 
   def first_creation
-    created_at.localtime.strftime('%d/%m/%Y %H:%M')
+    created_at.strftime('%d/%m/%Y %H:%M')
   end
 
   def last_update
-    updated_at.localtime.strftime('%d/%m/%Y %H:%M')
+    updated_at.strftime('%d/%m/%Y %H:%M')
   end
 
   def display_state
diff --git a/app/decorators/procedure_decorator.rb b/app/decorators/procedure_decorator.rb
index 6b1fc43c3..e4933fbea 100644
--- a/app/decorators/procedure_decorator.rb
+++ b/app/decorators/procedure_decorator.rb
@@ -2,12 +2,12 @@ class ProcedureDecorator < Draper::Decorator
   delegate_all
 
   def created_at_fr
-    created_at.localtime.strftime('%d/%m/%Y %H:%M')
+    created_at.strftime('%d/%m/%Y %H:%M')
   end
 
   def published_at_fr
     if published_at.present?
-      published_at.localtime.strftime('%d/%m/%Y %H:%M')
+      published_at.strftime('%d/%m/%Y %H:%M')
     end
   end
 
diff --git a/app/helpers/commentaire_helper.rb b/app/helpers/commentaire_helper.rb
index f42450024..684ff2356 100644
--- a/app/helpers/commentaire_helper.rb
+++ b/app/helpers/commentaire_helper.rb
@@ -20,7 +20,7 @@ module CommentaireHelper
   def commentaire_date(commentaire)
     is_current_year = (commentaire.created_at.year == Date.current.year)
     template = is_current_year ? :message_date : :message_date_with_year
-    I18n.l(commentaire.created_at.localtime, format: template)
+    I18n.l(commentaire.created_at, format: template)
   end
 
   private
diff --git a/app/models/commentaire.rb b/app/models/commentaire.rb
index e3b3d2c72..8b510b095 100644
--- a/app/models/commentaire.rb
+++ b/app/models/commentaire.rb
@@ -14,7 +14,7 @@ class Commentaire < ApplicationRecord
   after_create :notify
 
   def header
-    "#{sender}, #{I18n.l(created_at.localtime, format: '%d %b %Y %H:%M')}"
+    "#{sender}, #{I18n.l(created_at, format: '%d %b %Y %H:%M')}"
   end
 
   def sender
diff --git a/app/models/concerns/tags_substitution_concern.rb b/app/models/concerns/tags_substitution_concern.rb
index b861fd026..c57ac92ef 100644
--- a/app/models/concerns/tags_substitution_concern.rb
+++ b/app/models/concerns/tags_substitution_concern.rb
@@ -126,7 +126,7 @@ module TagsSubstitutionConcern
 
   def format_date(date)
     if date.present?
-      date.localtime.strftime('%d/%m/%Y')
+      date.strftime('%d/%m/%Y')
     else
       ''
     end
diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index 7057665b3..fdcf4336c 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -194,7 +194,7 @@ class Dossier < ApplicationRecord
     else
       parts = [
         "Dossier déposé le ",
-        en_construction_at.localtime.strftime("%d/%m/%Y"),
+        en_construction_at.strftime("%d/%m/%Y"),
         " sur la démarche ",
         procedure.libelle,
         " gérée par l'organisme ",
diff --git a/app/views/new_gestionnaire/avis/instruction.html.haml b/app/views/new_gestionnaire/avis/instruction.html.haml
index 5bef952d5..35e545155 100644
--- a/app/views/new_gestionnaire/avis/instruction.html.haml
+++ b/app/views/new_gestionnaire/avis/instruction.html.haml
@@ -8,7 +8,7 @@
     %h2.claimant
       Demandeur :
       %span.email= @avis.claimant.email
-      %span.date Demande d'avis envoyée le #{I18n.l(@avis.created_at.localtime, format: '%d/%m/%y')}
+      %span.date Demande d'avis envoyée le #{I18n.l(@avis.created_at, format: '%d/%m/%y')}
     %p.introduction= @avis.introduction
 
     = form_for @avis, url: gestionnaire_avis_path(@avis), html: { class: 'form' } do |f|
diff --git a/app/views/new_gestionnaire/shared/avis/_list.html.haml b/app/views/new_gestionnaire/shared/avis/_list.html.haml
index fb34568fb..8bbc4654d 100644
--- a/app/views/new_gestionnaire/shared/avis/_list.html.haml
+++ b/app/views/new_gestionnaire/shared/avis/_list.html.haml
@@ -15,7 +15,7 @@
                 confidentiel
                 %span.icon.lock{ title: "Cet avis n'est pas affiché avec les autres experts consultés" }
             %span.date{ class: highlight_if_unseen_class(avis_seen_at, avis.created_at) }
-              Demande d'avis envoyée le #{I18n.l(avis.created_at.localtime, format: '%d/%m/%y à %H:%M')}
+              Demande d'avis envoyée le #{I18n.l(avis.created_at, format: '%d/%m/%y à %H:%M')}
           %p= avis.introduction
 
           .answer.flex.align-start
@@ -25,7 +25,7 @@
                 = (avis.email_to_display == current_gestionnaire.email) ? 'Vous' : avis.email_to_display
                 - if avis.answer.present?
                   %span.date{ class: highlight_if_unseen_class(avis_seen_at, avis.updated_at) }
-                    Réponse donnée le #{I18n.l(avis.updated_at.localtime, format: '%d/%m/%y à %H:%M')}
+                    Réponse donnée le #{I18n.l(avis.updated_at, format: '%d/%m/%y à %H:%M')}
                 - else
                   %span.waiting En attente de réponse
               %p= avis.answer
diff --git a/app/views/new_user/dossiers/index.html.haml b/app/views/new_user/dossiers/index.html.haml
index 1f9be4d28..80f6a9aff 100644
--- a/app/views/new_user/dossiers/index.html.haml
+++ b/app/views/new_user/dossiers/index.html.haml
@@ -48,7 +48,7 @@
                   = render partial: 'shared/dossiers/status_badge', locals: { dossier: dossier }
               %td.updated-at-col
                 = link_to(url_for_dossier(dossier), class: 'cell-link') do
-                  = dossier.updated_at.localtime.strftime("%d/%m/%Y")
+                  = dossier.updated_at.strftime("%d/%m/%Y")
     = paginate(@dossiers)
 
     - if current_user.feedbacks.empty? || current_user.feedbacks.last.created_at < 1.month.ago
diff --git a/app/views/shared/dossiers/_champs.html.haml b/app/views/shared/dossiers/_champs.html.haml
index cf69342c6..b7feb25a9 100644
--- a/app/views/shared/dossiers/_champs.html.haml
+++ b/app/views/shared/dossiers/_champs.html.haml
@@ -73,4 +73,4 @@
           %td.updated-at
             %span{ class: highlight_if_unseen_class(demande_seen_at, c.updated_at) }
               modifié le
-              = c.updated_at.localtime.strftime("%d/%m/%Y à %H:%M")
+              = c.updated_at.strftime("%d/%m/%Y à %H:%M")
diff --git a/app/views/shared/dossiers/_pieces_jointes.html.haml b/app/views/shared/dossiers/_pieces_jointes.html.haml
index 78dafa823..ec9218d2e 100644
--- a/app/views/shared/dossiers/_pieces_jointes.html.haml
+++ b/app/views/shared/dossiers/_pieces_jointes.html.haml
@@ -23,11 +23,11 @@
                         = link_to pj.content_url, { target: :blank } do
                           %span.filename= display_pj_filename(pj)
                           %span
-                            ajoutée le #{pj.created_at.localtime.strftime('%d/%m/%Y à %H:%M')}
+                            ajoutée le #{pj.created_at.strftime('%d/%m/%Y à %H:%M')}
         - else
           %td Pièce non fournie
         %td.updated-at
           - if pj
             %span{ class: highlight_if_unseen_class(demande_seen_at, pj.updated_at) }
               modifié le
-              = pj.updated_at.localtime.strftime("%d/%m/%Y à %H:%M")
+              = pj.updated_at.strftime("%d/%m/%Y à %H:%M")