DateTime.parse => Time.zone.parse

app/decorators/champ_decorator.rb

@@ -24,7 +24,7 @@ class ChampDecorator < Draper::Decorator
       if type_champ == TypeDeChamp.type_champs.fetch(:date)
         object.value
       elsif type_champ == TypeDeChamp.type_champs.fetch(:datetime) && object.value != ' 00:00'
-        DateTime.parse(object.value, "%Y-%m-%d %H:%M").strftime("%Y-%m-%d")
+        Time.zone.parse(object.value, "%Y-%m-%d %H:%M").strftime("%Y-%m-%d")
       end
     end
   end

app/models/champs/datetime_champ.rb

@@ -30,7 +30,7 @@ class Champs::DatetimeChamp < Champ
           nil
         end
     elsif /^\d{2}\/\d{2}\/\d{4}\s\d{2}:\d{2}$/.match?(value) # old browsers can send with dd/mm/yyyy hh:mm format
-      self.value = DateTime.parse(value, "%d/%m/%Y %H:%M").strftime("%Y-%m-%d %H:%M")
+      self.value = Time.zone.parse(value, "%d/%m/%Y %H:%M").strftime("%Y-%m-%d %H:%M")
     elsif !(/^\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}$/.match?(value)) # a datetime not correctly formatted should not be stored
       self.value = nil
     end

app/views/shared/dossiers/editable_champs/_datetime.html.haml

@@ -1,4 +1,4 @@
-- parsed_value = champ.value.present? ? DateTime.parse(champ.value) : Time.zone.now
+- parsed_value = champ.value.present? ? Time.zone.parse(champ.value) : Time.zone.now
 
 .datetime
   = form.datetime_select(:value, selected: parsed_value, start_year: 1950, end_year: 2100, minute_step: 5)