diff --git a/components/common/Calendar.js b/components/common/Calendar.js
index 237f065e..92fd311c 100644
--- a/components/common/Calendar.js
+++ b/components/common/Calendar.js
@@ -20,6 +20,7 @@ import Button from './Button';
 import useLocale from 'hooks/useLocale';
 import { dateFormat } from 'lib/date';
 import { chunk } from 'lib/array';
+import { dateLocales } from 'lib/lang';
 import Chevron from 'assets/chevron-down.svg';
 import Cross from 'assets/times.svg';
 import styles from './Calendar.module.css';
@@ -105,8 +106,8 @@ export default function Calendar({ date, minDate, maxDate, onChange }) {
 }
 
 const DaySelector = ({ date, minDate, maxDate, locale, onSelect }) => {
-  const startWeek = startOfWeek(date);
-  const startMonth = startOfMonth(date);
+  const startWeek = startOfWeek(date, { locale: dateLocales[locale] });
+  const startMonth = startOfMonth(date, { locale: dateLocales[locale] });
   const startDay = subDays(startMonth, startMonth.getDay());
   const month = date.getMonth();
   const year = date.getFullYear();