diff --git a/src/fullcalendar/localization/localeProvider.js b/src/fullcalendar/localization/localeProvider.js
index 150737429..a2f360f67 100644
--- a/src/fullcalendar/localization/localeProvider.js
+++ b/src/fullcalendar/localization/localeProvider.js
@@ -2,10 +2,7 @@
  * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-import { translate as t, getLanguage } from '@nextcloud/l10n'
-import {
-	getFirstDayOfWeekFromMomentLocale,
-} from '../../utils/moment.js'
+import { translate as t, getLanguage, getFirstDay } from '@nextcloud/l10n'
 
 /**
  * Returns localization settings for the FullCalender package.
@@ -15,7 +12,7 @@ import {
  */
 const getFullCalendarLocale = () => {
 	return {
-		firstDay: getFirstDayOfWeekFromMomentLocale(),
+		firstDay: getFirstDay(),
 		locale: getLanguage(),
 		// TRANSLATORS W is an abbreviation for Week
 		weekText: t('calendar', 'W'),
diff --git a/src/utils/localization.js b/src/utils/localization.js
index 4de4bc625..af8f9bf20 100644
--- a/src/utils/localization.js
+++ b/src/utils/localization.js
@@ -7,6 +7,7 @@ import {
 	getDayNames,
 	getDayNamesMin,
 	getDayNamesShort,
+	getFirstDay,
 	getMonthNames,
 	getMonthNamesShort,
 } from '@nextcloud/l10n'
@@ -31,7 +32,7 @@ const getLangConfigForVue2DatePicker = (momentLocale) => {
 			weekdays: getDayNames(),
 			weekdaysShort: getDayNamesShort(),
 			weekdaysMin: getDayNamesMin(),
-			firstDayOfWeek: moment.localeData(momentLocale).firstDayOfWeek(),
+			firstDayOfWeek: getFirstDay(),
 			firstWeekContainsDate: moment.localeData(momentLocale).firstDayOfYear(),
 			meridiem: moment.localeData(momentLocale).meridiem,
 			meridiemParse: moment.localeData(momentLocale).meridiemParse,
diff --git a/src/utils/moment.js b/src/utils/moment.js
index 3ef765bd8..7d3aad5b1 100644
--- a/src/utils/moment.js
+++ b/src/utils/moment.js
@@ -2,7 +2,7 @@
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-import { getLanguage, getLocale } from '@nextcloud/l10n'
+import { getFirstDay, getLanguage, getLocale } from '@nextcloud/l10n'
 import moment from '@nextcloud/moment'
 
 /**
@@ -38,7 +38,7 @@ export default async function loadMomentLocalization() {
 			llll: moment.localeData(realLocale).longDateFormat('llll'),
 		},
 		week: {
-			dow: moment.localeData(realLocale).firstDayOfWeek(),
+			dow: getFirstDay(),
 			doy: moment.localeData(realLocale).firstDayOfYear(),
 		},
 	})
@@ -77,12 +77,3 @@ async function getLocaleFor(locale) {
 
 	return 'en'
 }
-
-/**
- * Get's the first day of a week based on a moment locale
- *
- * @return {number}
- */
-export function getFirstDayOfWeekFromMomentLocale() {
-	return moment.localeData().firstDayOfWeek()
-}