Use time.zone functions instead of server time functions

(Time.zone.today vs Date.today)

app/controllers/stats_controller.rb

@@ -163,8 +163,8 @@ class StatsController < ApplicationController
   def contact_percentage
     number_of_months = 13
 
-    from = Date.today.prev_month(number_of_months)
-    to = Date.today.prev_month
+    from = Time.zone.today.prev_month(number_of_months)
+    to = Time.zone.today.prev_month
 
     adapter = Helpscout::UserConversationsAdapter.new(from, to)
     if !adapter.can_fetch_reports?

app/helpers/commentaire_helper.rb

@@ -18,7 +18,7 @@ module CommentaireHelper
   end
 
   def commentaire_date(commentaire)
-    is_current_year = (commentaire.created_at.year == Date.current.year)
+    is_current_year = (commentaire.created_at.year == Time.zone.today.year)
     template = is_current_year ? :message_date : :message_date_with_year
     I18n.l(commentaire.created_at, format: template)
   end

app/lib/helpscout/user_conversations_adapter.rb

@@ -35,7 +35,7 @@ class Helpscout::UserConversationsAdapter
   end
 
   def fetch_productivity_report(year, month)
-    if year == Date.today.year && month == Date.today.month
+    if year == Time.zone.today.year && month == Time.zone.today.month
       raise ArgumentError, 'The report for the current month will change in the future, and cannot be cached.'
     end
 

app/models/champs/date_champ.rb

@@ -6,11 +6,11 @@ class Champs::DateChamp < Champ
   end
 
   def to_s
-    value.present? ? I18n.l(Date.parse(value)) : ""
+    value.present? ? I18n.l(Time.zone.parse(value), format: '%d %B %Y') : ""
   end
 
   def for_tag
-    value.present? ? I18n.l(Date.parse(value)) : ""
+    value.present? ? I18n.l(Time.zone.parse(value), format: '%d %B %Y') : ""
   end
 
   private
@@ -18,7 +18,7 @@ class Champs::DateChamp < Champ
   def format_before_save
     self.value =
       begin
-        Date.parse(value).iso8601
+        Time.zone.parse(value).to_date.iso8601
       rescue
         nil
       end