diff --git a/src/utils/config/service-helpers.js b/src/utils/config/service-helpers.js
index 91e5b75c..543bf5ee 100644
--- a/src/utils/config/service-helpers.js
+++ b/src/utils/config/service-helpers.js
@@ -358,7 +358,6 @@ export function cleanServiceGroups(groups) {
           mappings, // customapi widget
           refreshInterval,
           integrations, // calendar widget
-          firstDayInWeek,
         } = cleanedService.widget;
 
         let fieldsList = fields;
@@ -444,7 +443,6 @@ export function cleanServiceGroups(groups) {
         }
         if (type === "calendar") {
           if (integrations) cleanedService.widget.integrations = integrations;
-          if (firstDayInWeek) cleanedService.widget.firstDayInWeek = firstDayInWeek;
         }
       }
 
diff --git a/src/widgets/calendar/monthly-view.jsx b/src/widgets/calendar/monthly-view.jsx
index 5d4a2b17..383d9881 100644
--- a/src/widgets/calendar/monthly-view.jsx
+++ b/src/widgets/calendar/monthly-view.jsx
@@ -98,13 +98,13 @@ export default function MonthlyView({ service }) {
 
   const dayNames = Info.weekdays("short", { locale: i18n.language });
 
-  const firstDayInWeekCalendar = widget?.firstDayInWeek ? widget?.firstDayInWeek?.toLowerCase() : "monday";
-  for (let i = 1; i < dayInWeekId[firstDayInWeekCalendar]; i+=1) {
+  const firstDayInCalendar = widget?.firstDayInCalendar ? widget?.firstDayInCalendar?.toLowerCase() : "monday";
+  for (let i = 1; i < dayInWeekId[firstDayInCalendar]; i+=1) {
     dayNames.push(dayNames.shift());
   }
 
-  const daysInWeek = useMemo(() => [ ...Array(7).keys() ].map( i => i + dayInWeekId[firstDayInWeekCalendar]
-  ), [(firstDayInWeekCalendar)]);
+  const daysInWeek = useMemo(() => [ ...Array(7).keys() ].map( i => i + dayInWeekId[firstDayInCalendar]
+  ), [(firstDayInCalendar)]);
 
   if (!showDate) {
     return <div className="w-full text-center" />;