diff --git a/templates/billing/pre_billing.html b/templates/billing/pre_billing.html
index c166e940..245ef826 100644
--- a/templates/billing/pre_billing.html
+++ b/templates/billing/pre_billing.html
@@ -199,14 +199,6 @@ <h4>{{ mission.lead }} ({{ mission.lead.deal_id }})</h4>
 {% include "core/_datepicker.html" %}
 
 <script type="text/javascript">
-    // set dates on widgets with template value
-            {% if start_date %}
-                $("#startDate").datepicker("setDate", new Date("{{ start_date|date:"Y-m-d" }}"));
-            {% endif %}
-            {% if end_date %}
-                $("#endDate").datepicker("setDate", new Date("{{ end_date|date:"Y-m-d" }}"));
-            {% endif %}
-
 $(document).ready(function() {
     $(".pydici-tooltip").tooltip();
 
diff --git a/templates/core/_datepicker.html b/templates/core/_datepicker.html
index 52232eb6..d1838f20 100644
--- a/templates/core/_datepicker.html
+++ b/templates/core/_datepicker.html
@@ -20,7 +20,6 @@
     $('input.datepicker').datepicker(
             {language: {% if LANGUAGE_CODE == "fr-fr" %}'fr'{% else %}'en'{% endif %},
              autoclose: true,
-             orientation: 'top',
              todayHighlight: true});
 });
 </script>
diff --git a/templates/core/_pivotable_header.html b/templates/core/_pivotable_header.html
index 8e04ada8..71cf72b3 100644
--- a/templates/core/_pivotable_header.html
+++ b/templates/core/_pivotable_header.html
@@ -1,6 +1,12 @@
 {# load pivotable script and css #}
 
 <script src="{{ MEDIA_URL }}js/jquery-ui-1.12.1.min.js"></script>
+<!-- Load again bootstrap date picker to override jquery-ui datepicker -->
+<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.10.0/js/bootstrap-datepicker.min.js" integrity="sha512-LsnSViqQyaXpD4mBBdRYeP6sRwJiJveh2ZIbW41EBrNmKxgr/LFZIiWT6yr+nycvhvauz8c2nYMhrP80YhG7Cw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
+{% if LANGUAGE_CODE == "fr-fr" %}
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.10.0/locales/bootstrap-datepicker.fr.min.js" integrity="sha512-fx3aztaUjb4NyoD+Tso5g7R1l29bU3jnnTfNRKBiY9fdQOHzVhKJ10wEAgQ1zM/WXCzB9bnVryHD1M40775Tsw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
+{% endif %}
+
 <script src="https://cdnjs.cloudflare.com/ajax/libs/pivottable/2.23.0/pivot.min.js" integrity="sha512-XgJh9jgd6gAHu9PcRBBAp0Hda8Tg87zi09Q2639t0tQpFFQhGpeCgaiEFji36Ozijjx9agZxB0w53edOFGCQ0g==" crossorigin="anonymous"></script>
 {% if LANGUAGE_CODE == "fr-fr" %}
     <script src="https://cdnjs.cloudflare.com/ajax/libs/pivottable/2.23.0/pivot.fr.min.js" integrity="sha512-ScdKOdoxfAtvR/Dw6a3wBITAUv5TnGFbyAKmPFcnc2D2ZCHLZpNXizFMIjAbwPEO8AOYH8njwSeLFHCmFlh+Mg==" crossorigin="anonymous"></script>