diff --git a/app/shared/overnight-calendar/OvernightCalendar.js b/app/shared/overnight-calendar/OvernightCalendar.js
index 97ce79774..5a20466a9 100644
--- a/app/shared/overnight-calendar/OvernightCalendar.js
+++ b/app/shared/overnight-calendar/OvernightCalendar.js
@@ -9,6 +9,7 @@ import { bindActionCreators } from 'redux';
 import { injectT } from 'i18n';
 import {
   areDatesSameAsInitialDates,
+  closedDaysModifier,
   filterSelectedReservation,
   getNotSelectableNotificationText,
   getNotificationText,
@@ -177,7 +178,6 @@ function OvernightCalendar({
     startDate, endDate, overnightStartTime, overnightEndTime);
   const isDurBelowMin = hasAdminBypass ? false : isDurationBelowMin(selectedDuration, minPeriod);
 
-  // TODO: accessibility, refactoring, tests
   return (
     <div className="overnight-calendar">
       <OvernightHiddenHeading
@@ -212,13 +212,16 @@ function OvernightCalendar({
           end,
           highlighted,
           available,
+          closed: (day) => closedDaysModifier(day, openingHours),
           booked: (day) => (
             startDate ? null : reservationsModifier(day, filteredReservations)),
-          nextBooked: (day) => nextDayBookedModifier(day, filteredReservations),
+          nextBooked: (day) => (
+            startDate ? null : nextDayBookedModifier(day, filteredReservations)),
           nextBookedStartSelected: (day) => (
             startDate ? nextDayBookedModifier(day, filteredReservations) : null),
           nextClosed: (day) => nextDayClosedModifier(day, openingHours),
-          prevBooked: (day) => prevDayBookedModifier(day, filteredReservations),
+          prevBooked: (day) => (
+            startDate ? null : prevDayBookedModifier(day, filteredReservations)),
           prevClosed: (day) => prevDayClosedModifier(day, openingHours),
         }}
         onDayClick={validateAndSelect}
diff --git a/app/shared/overnight-calendar/_overnight-calendar.scss b/app/shared/overnight-calendar/_overnight-calendar.scss
index 268b81952..2a9f8459b 100644
--- a/app/shared/overnight-calendar/_overnight-calendar.scss
+++ b/app/shared/overnight-calendar/_overnight-calendar.scss
@@ -86,6 +86,14 @@
       color: $dark-gray;
     }
 
+    &--closed {
+      cursor: pointer;
+      text-decoration: line-through;
+      background: initial !important;
+      background-color: $medium-gray !important;
+      color: $dark-gray !important;
+    }
+
     &--available:not(.DayPicker-Day--disabled) {
       background-color: $available-color-green;
 
@@ -148,7 +156,7 @@
     &--end:not(.DayPicker-Day--disabled) {
       background: linear-gradient($half-day-angle, $highlighted-color 49%, $available-color 50%);
 
-      &.DayPicker-Day--nextBooked {
+      &.DayPicker-Day--nextBookedStartSelected {
         background: linear-gradient($half-day-angle, $highlighted-color 49%, $medium-gray 50%);
       }
 
@@ -180,8 +188,9 @@
     @include add-focus(2px, $black) {}
   }
 
-  .DayPicker-Day--nextClosed.DayPicker-Day--prevBooked:not(.DayPicker-Day--disabled) {
+  .DayPicker-Day--nextClosed.DayPicker-Day--prevBooked {
     background: linear-gradient($half-day-angle, $booked-color 49%, $medium-gray 50%);
+    color: $black;
   }
 
   .DayPicker-Day--nextBooked.DayPicker-Day--prevClosed:not(.DayPicker-Day--disabled) {
@@ -192,11 +201,31 @@
     background: linear-gradient($half-day-angle, $booked-color 49%, $medium-gray 50%);
   }
 
-  .DayPicker-Day--booked.DayPicker-Day--prevClosed:not(.DayPicker-Day--disabled) {
+  .DayPicker-Day--nextBooked.DayPicker-Day--disabled:not(.DayPicker-Day--booked) {
     background: linear-gradient($half-day-angle, $medium-gray 49%, $booked-color 50%);
+    color: $black;
+  }
+
+  .DayPicker-Day--prevBooked.DayPicker-Day--disabled:not(.DayPicker-Day--booked) {
+    background: linear-gradient($half-day-angle, $booked-color 49%, $medium-gray 50%);
+    color: $black;
+  }
+
+  .DayPicker-Day--booked.DayPicker-Day--prevClosed {
+    background: linear-gradient($half-day-angle, $medium-gray 49%, $booked-color 50%);
+  }
+
+  .DayPicker-Day--nextBooked.DayPicker-Day--prevBooked:not(.DayPicker-Day--closed) {
+    background: initial;
+    background-color: $booked-color;
+    text-decoration: line-through;
+
+    &:hover {
+      background-color: $booked-color !important;
+    }
   }
 
-  .DayPicker-Day--nextBooked.DayPicker-Day--prevBooked:not(.DayPicker-Day--disabled) {
+  .DayPicker-Day--nextBooked.DayPicker-Day--prevBooked.DayPicker-Day--disabled:not(.DayPicker-Day--closed) {
     background: initial;
     background-color: $booked-color;
     text-decoration: line-through;
diff --git a/app/shared/overnight-calendar/overnightUtils.js b/app/shared/overnight-calendar/overnightUtils.js
index 7242c7ded..6a2f35365 100644
--- a/app/shared/overnight-calendar/overnightUtils.js
+++ b/app/shared/overnight-calendar/overnightUtils.js
@@ -180,6 +180,24 @@ export function prevDayBookedModifier(day, reservations) {
   return false;
 }
 
+/**
+ * Returns closed days modifier for DayPicker
+ * @param {Date} day
+ * @param {Object[]} openingHours
+ * @returns {boolean} is day closed
+ */
+export function closedDaysModifier(day, openingHours) {
+  const closedDays = getClosedDays(openingHours);
+  const momentDay = moment(day);
+  for (let index = 0; index < closedDays.length; index += 1) {
+    const closedDay = closedDays[index];
+    if (momentDay.isSame(closedDay.date, 'day')) {
+      return true;
+    }
+  }
+  return false;
+}
+
 /**
  * Modifier for DayPicker that checks if the next day is closed.
  * @param {Date} day
diff --git a/app/shared/overnight-calendar/tests/overnightUtils.spec.js b/app/shared/overnight-calendar/tests/overnightUtils.spec.js
index 6acae358e..ce1bbfe9b 100644
--- a/app/shared/overnight-calendar/tests/overnightUtils.spec.js
+++ b/app/shared/overnight-calendar/tests/overnightUtils.spec.js
@@ -2,6 +2,7 @@ import moment from 'moment';
 
 import {
   areDatesSameAsInitialDates,
+  closedDaysModifier,
   filterSelectedReservation,
   findFirstClosedDay,
   findFirstClosestReservation,
@@ -326,6 +327,36 @@ describe('app/shared/overnight-calendar/overnightUtils', () => {
     });
   });
 
+  describe('closedDaysModifier', () => {
+    const openingHours = [
+      { date: '2024-04-19', closes: null, opens: null },
+      { date: '2024-04-20', closes: '2024-04-20T20:00:00+03:00', opens: '2024-04-20T06:00:00+03:00' },
+      { date: '2024-04-21', closes: null, opens: null },
+      { date: '2024-04-22', closes: '2024-04-22T20:00:00+03:00', opens: '2024-04-22T06:00:00+03:00' },
+      { date: '2024-04-23', closes: '2024-04-23T20:00:00+03:00', opens: '2024-04-23T06:00:00+03:00' },
+      { date: '2024-04-24', closes: null, opens: null },
+    ];
+    test('returns true when day is closed', () => {
+      expect(closedDaysModifier(
+        moment('2024-04-19').toDate(), openingHours)).toBe(true);
+      expect(closedDaysModifier(
+        moment('2024-04-21').toDate(), openingHours)).toBe(true);
+      expect(closedDaysModifier(
+        moment('2024-04-24').toDate(), openingHours)).toBe(true);
+    });
+
+    test('returns false when day is not closed', () => {
+      expect(closedDaysModifier(
+        moment('2024-04-20').toDate(), openingHours)).toBe(false);
+      expect(closedDaysModifier(
+        moment('2024-04-22').toDate(), openingHours)).toBe(false);
+      expect(closedDaysModifier(
+        moment('2024-04-23').toDate(), openingHours)).toBe(false);
+      expect(closedDaysModifier(
+        moment('2024-04-25').toDate(), openingHours)).toBe(false);
+    });
+  });
+
   describe('nextDayClosedModifier', () => {
     const openingHours = [
       { date: '2024-04-19', closes: null, opens: null },