diff --git a/crabfit-frontend/src/components/CalendarField/CalendarField.tsx b/crabfit-frontend/src/components/CalendarField/CalendarField.tsx
index 3e46b56..2892269 100644
--- a/crabfit-frontend/src/components/CalendarField/CalendarField.tsx
+++ b/crabfit-frontend/src/components/CalendarField/CalendarField.tsx
@@ -19,7 +19,7 @@ import {
 	Day,
 } from './calendarFieldStyle';
 
-import supportedLocales from 'res/dayjs_locales.json';
+import localeImports from 'res/dayjs_locales';
 
 dayjs.extend(isToday);
 dayjs.extend(localeData);
@@ -90,8 +90,8 @@ const CalendarField = ({
 	};
 
 	useEffect(() => {
-    if (Array.from(supportedLocales).includes(i18n.language)) {
-      import(`dayjs/locale/${i18n.language}.js`).then(() => {
+    if (Object.keys(localeImports).includes(i18n.language)) {
+      localeImports[i18n.language]().then(() => {
         dayjs.locale(i18n.language);
         if (weekStart !== dayjs.Ls[i18n.language].weekStart) {
           dayjs.updateLocale(i18n.language, { weekStart });
diff --git a/crabfit-frontend/src/pages/Event/Event.tsx b/crabfit-frontend/src/pages/Event/Event.tsx
index c12b97f..d7f6674 100644
--- a/crabfit-frontend/src/pages/Event/Event.tsx
+++ b/crabfit-frontend/src/pages/Event/Event.tsx
@@ -39,7 +39,7 @@ import { useSettingsStore, useRecentsStore } from 'stores';
 
 import logo from 'res/logo.svg';
 import timezones from 'res/timezones.json';
-import supportedLocales from 'res/dayjs_locales.json';
+import localeImports from 'res/dayjs_locales';
 
 dayjs.extend(utc);
 dayjs.extend(timezone);
@@ -76,8 +76,8 @@ const Event = (props) => {
 	const [copied, setCopied] = useState(null);
 
   useEffect(() => {
-    if (Array.from(supportedLocales).includes(i18n.language)) {
-      import(`dayjs/locale/${i18n.language}.js`).then(() => dayjs.locale(i18n.language));
+    if (Object.keys(localeImports).includes(i18n.language)) {
+      localeImports[i18n.language]().then(() => dayjs.locale(i18n.language));
     }
   }, [i18n.language]);
 
diff --git a/crabfit-frontend/src/res/dayjs_locales.js b/crabfit-frontend/src/res/dayjs_locales.js
new file mode 100644
index 0000000..51307f3
--- /dev/null
+++ b/crabfit-frontend/src/res/dayjs_locales.js
@@ -0,0 +1,8 @@
+const locales = {
+  en: () => import('dayjs/locale/en'),
+  de: () => import('dayjs/locale/de'),
+  es: () => import('dayjs/locale/es'),
+  ko: () => import('dayjs/locale/ko'),
+};
+
+export default locales;