diff --git a/app/assets/javascripts/controllers/admin/invoices.js.erb b/app/assets/javascripts/controllers/admin/invoices.js.erb
index 6fb6e1dcd..fd64f3a5f 100644
--- a/app/assets/javascripts/controllers/admin/invoices.js.erb
+++ b/app/assets/javascripts/controllers/admin/invoices.js.erb
@@ -620,8 +620,8 @@ Application.Controllers.controller('AvoirModalController', ['$scope', '$uibModal
  */
 Application.Controllers.controller('ClosePeriodModalController', ['$scope', '$uibModalInstance', 'Invoice', 'AccountingPeriod', 'periods', 'lastClosingEnd','dialogs', 'growl', '_t',
   function ($scope, $uibModalInstance, Invoice, AccountingPeriod, periods, lastClosingEnd, dialogs, growl, _t) {
-    const YESTERDAY = moment().subtract(1, 'day').toDate();
-    const LAST_CLOSING = moment(lastClosingEnd.last_end_date).toDate();
+    const YESTERDAY = moment.utc({ h: 0, m: 0, s: 0, ms: 0 }).subtract(1, 'day').toDate();
+    const LAST_CLOSING = moment.utc(lastClosingEnd.last_end_date).toDate();
 
     /* PUBLIC SCOPE */
     $scope.period = {
@@ -663,7 +663,10 @@ Application.Controllers.controller('ClosePeriodModalController', ['$scope', '$ui
             object () {
               return {
                 title: _t('invoices.confirmation_required'),
-                msg: _t('invoices.confirm_close')
+                msg: _t(
+                  'invoices.confirm_close_START_END',
+                  { START: moment($scope.period.start_at).format('LL'), END: moment($scope.period.end_at).format('LL') }
+                )
               };
             }
           }
diff --git a/config/locales/app.admin.en.yml b/config/locales/app.admin.en.yml
index bc575fbb5..fa57cd4bb 100644
--- a/config/locales/app.admin.en.yml
+++ b/config/locales/app.admin.en.yml
@@ -413,7 +413,7 @@ en:
           closed_at: "Closed at"
           closed_by: "By"
           confirmation_required: "Confirmation required"
-          confirm_close: "Do you really want to close this accounting period ? Any subsequent changes will be impossible."
+          confirm_close_START_END: "Do you really want to close the accounting period between {{START}} and {{END}}? Any subsequent changes will be impossible."
           period_START_END_closed_success: "The accounting period from {{START}} to {{END}} has been successfully closed"
           failed_to_close_period: "An error occurred, unable to close the accounting period"
           no_periods: "No closings for now"
diff --git a/config/locales/app.admin.es.yml b/config/locales/app.admin.es.yml
index f2d1db67a..8ec292fb1 100644
--- a/config/locales/app.admin.es.yml
+++ b/config/locales/app.admin.es.yml
@@ -413,7 +413,7 @@ es:
           closed_at: "Closed at"                                                       # translation_missing
           closed_by: "By"                                                              # translation_missing
           confirmation_required: "Confirmation required"                               # translation_missing
-          confirm_close: "Do you really want to close this accounting period ? Any subsequent changes will be impossible."       # translation_missing
+          confirm_close_START_END: "Do you really want to close the accounting period between {{START}} and {{END}}? Any subsequent changes will be impossible."       # translation_missing
           period_START_END_closed_success: "The accounting period from {{START}} to {{END}} has been successfully closed"        # translation_missing
           failed_to_close_period: "An error occurred, unable to close the accounting period"                                     # translation_missing
           no_periods: "No closings for now"                                            # translation_missing
diff --git a/config/locales/app.admin.fr.yml b/config/locales/app.admin.fr.yml
index 1734b8f2e..e385bfada 100644
--- a/config/locales/app.admin.fr.yml
+++ b/config/locales/app.admin.fr.yml
@@ -413,7 +413,7 @@ fr:
           closed_at: "Clôturé le"
           closed_by: "Par"
           confirmation_required: "Confirmation requise"
-          confirm_close: "Êtes-vous sur de vouloir clôturer cette période comptable ? Toute modification ultérieure sera impossible."
+          confirm_close_START_END: "Êtes-vous sur de vouloir clôturer la période comptable du {{START}} au {{END}} ? Toute modification ultérieure sera impossible."
           period_START_END_closed_success: "La période comptable du {{START}} au {{END}} a bien été clôturée"
           failed_to_close_period: "Une erreur est survenue, impossible de clôturer la période comptable"
           no_periods: "Aucune clôture pour le moment"
diff --git a/config/locales/app.admin.pt.yml b/config/locales/app.admin.pt.yml
index b569cb3f6..09bf45f61 100755
--- a/config/locales/app.admin.pt.yml
+++ b/config/locales/app.admin.pt.yml
@@ -413,7 +413,7 @@ pt:
           closed_at: "Closed at"                                                       # translation_missing
           closed_by: "By"                                                              # translation_missing
           confirmation_required: "Confirmation required"                               # translation_missing
-          confirm_close: "Do you really want to close this accounting period ? Any subsequent changes will be impossible."       # translation_missing
+          confirm_close_START_END: "Do you really want to close the accounting period between {{START}} and {{END}}? Any subsequent changes will be impossible."       # translation_missing
           period_START_END_closed_success: "The accounting period from {{START}} to {{END}} has been successfully closed"        # translation_missing
           failed_to_close_period: "An error occurred, unable to close the accounting period"                                     # translation_missing
           no_periods: "No closings for now"                                            # translation_missing