diff --git a/components/common/Calendar.js b/components/common/Calendar.js
index d9c281d3..9ad1be88 100644
--- a/components/common/Calendar.js
+++ b/components/common/Calendar.js
@@ -105,7 +105,7 @@ export default function Calendar({ date, minDate, maxDate, onChange }) {
 const DaySelector = ({ date, minDate, maxDate, locale, onSelect }) => {
   const startWeek = startOfWeek(date);
   const startMonth = startOfMonth(date);
-  const startDay = subDays(startMonth, startMonth.getDay() + 1);
+  const startDay = subDays(startMonth, startMonth.getDay());
   const month = date.getMonth();
   const year = date.getFullYear();