diff --git a/src/components/CalendarDark/CalendarDark.jsx b/src/components/CalendarDark/CalendarDark.jsx
index 1e7d178..b52074c 100644
--- a/src/components/CalendarDark/CalendarDark.jsx
+++ b/src/components/CalendarDark/CalendarDark.jsx
@@ -33,6 +33,7 @@ export const CalendarDark = ({ onDate, deadline = String(new Date()) }) => {
       selected={Date.parse(startDate)}
       calendarClassName={s.calendarConatiner}
       popperClassName={s.popperCustomClass}
+      calendarStartDay={1}
       // formatWeekDay={day => day.substr(0, 2)}
       customInput={
         <CalendarButton
diff --git a/src/components/CalendarLight/CalendarLight.jsx b/src/components/CalendarLight/CalendarLight.jsx
index 4050514..d953ba2 100644
--- a/src/components/CalendarLight/CalendarLight.jsx
+++ b/src/components/CalendarLight/CalendarLight.jsx
@@ -33,6 +33,7 @@ export const CalendarLight = ({ onDate, deadline = String(new Date()) }) => {
       selected={Date.parse(startDate)}
       calendarClassName={s.calendarConatiner}
       popperClassName={s.popperCustomClass}
+      calendarStartDay={1}
       // formatWeekDay={day => day.substr(0, 2)}
       customInput={
         <CalendarButton