diff --git a/addons/web/static/src/legacy/js/views/calendar/calendar_model.js b/addons/web/static/src/legacy/js/views/calendar/calendar_model.js
index f1decec9088..f1a37543c1a 100644
--- a/addons/web/static/src/legacy/js/views/calendar/calendar_model.js
+++ b/addons/web/static/src/legacy/js/views/calendar/calendar_model.js
@@ -477,6 +477,7 @@ return AbstractModel.extend({
             monthNamesShort: moment.monthsShort(),
             dayNames: moment.weekdays(),
             dayNamesShort: moment.weekdaysShort(),
+            dayNamesMin: moment.weekdaysMin(),
             firstDay: this.week_start,
             slotLabelFormat: _t.database.parameters.time_format.search("%H") !== -1 ? format24Hour : format12Hour,
             allDaySlot: this.mapping.all_day || this.fields[this.mapping.date_start].type === 'date',
diff --git a/addons/web/static/src/legacy/js/views/calendar/calendar_renderer.js b/addons/web/static/src/legacy/js/views/calendar/calendar_renderer.js
index fc87d3876f7..1f0208c79dc 100644
--- a/addons/web/static/src/legacy/js/views/calendar/calendar_renderer.js
+++ b/addons/web/static/src/legacy/js/views/calendar/calendar_renderer.js
@@ -639,7 +639,7 @@ return AbstractRenderer.extend({
                 });
             },
             'showOtherMonths': true,
-            'dayNamesMin' : this.state.fc_options.dayNamesShort.map(x => x[0]),
+            'dayNamesMin': this.state.fc_options.dayNamesMin.map(x => x[0]),
             'monthNames': this.state.fc_options.monthNamesShort,
             'firstDay': this.state.fc_options.firstDay,
         });