diff --git a/addons/web/static/src/js/views/calendar/calendar_renderer.js b/addons/web/static/src/js/views/calendar/calendar_renderer.js
index 6565cbb8385..4c0fabadfdf 100644
--- a/addons/web/static/src/js/views/calendar/calendar_renderer.js
+++ b/addons/web/static/src/js/views/calendar/calendar_renderer.js
@@ -317,6 +317,11 @@ return AbstractRenderer.extend({
 
         this.$calendar = this.$(".o_calendar_widget");
 
+        // This seems like a workaround but apparently passing the locale
+        // in the options is not enough. We should initialize it beforehand
+        var locale = moment.locale();
+        $.fullCalendar.locale(locale);
+
         //Documentation here : http://arshaw.com/fullcalendar/docs/
         var fc_options = $.extend({}, this.state.fc_options, {
             eventDrop: function (event) {
@@ -370,6 +375,7 @@ return AbstractRenderer.extend({
             },
             height: 'parent',
             unselectAuto: false,
+            locale: locale, // reset locale when fullcalendar has already been instanciated before now
         });
 
         this.$calendar.fullCalendar(fc_options);
diff --git a/addons/web/static/tests/views/calendar_tests.js b/addons/web/static/tests/views/calendar_tests.js
index 00cdfa24dd2..fad84cc43c3 100644
--- a/addons/web/static/tests/views/calendar_tests.js
+++ b/addons/web/static/tests/views/calendar_tests.js
@@ -6,6 +6,7 @@ var CalendarRenderer = require('web.CalendarRenderer');
 var fieldUtils = require('web.field_utils');
 var mixins = require('web.mixins');
 var testUtils = require('web.test_utils');
+var time = require('web.time');
 var session = require('web.session');
 
 
@@ -2146,6 +2147,53 @@ QUnit.module('Views', {
         calendar.destroy();
     });
 
+    QUnit.test('fullcalendar initializes with right locale', function (assert) {
+        assert.expect(1);
+
+        // Do not forward port this part in versions >= saas11.3
+        testUtils.patch(time, {
+            getLangDateFormat: function () {
+                return 'DD/MM';
+            },
+        });
+
+        var initialLocale = moment.locale();
+        // This will set the locale to zz
+        moment.defineLocale('zz', {
+            longDateFormat: {
+                L: 'DD/MM/YYYY'
+            },
+            weekdaysShort: ["zz1.", "zz2.", "zz3.", "zz4.", "zz5.", "zz6.", "zz7."],
+        });
+
+        var calendar = createView({
+            View: CalendarView,
+            model: 'event',
+            data: this.data,
+            arch: '<calendar class="o_calendar_test" '+
+                'date_start="start" '+
+                'date_stop="stop" '+
+                'mode="week"> '+
+                    '<field name="name"/>'+
+            '</calendar>',
+            archs: archs,
+            viewOptions: {
+                initialDate: initialDate,
+                action: {views: [{viewID: 1, type: 'kanban'}, {viewID: 43, type: 'form'}]}
+            },
+
+        });
+
+        assert.strictEqual(calendar.$('.fc-day-header:first').text(), "zz1. 11/12",
+            'The day should be in the given locale specific format');
+
+        moment.locale(initialLocale);
+        // Do not forward port this part in versions >= saas11.3
+        testUtils.unpatch(time);
+
+        calendar.destroy();
+    });
+
 });
 
 });