diff --git a/components/Inputs/Date/DatePicker.vue b/components/Inputs/Date/DatePicker.vue
index fb4547d04..ad5ba2049 100644
--- a/components/Inputs/Date/DatePicker.vue
+++ b/components/Inputs/Date/DatePicker.vue
@@ -149,11 +149,13 @@ export default {
         onNextDate() {
             switch (this.selectedCalendarType) {
             case CalendarType.DAY: {
-                const { month, year } = getNextMonth(this.month, this.year);
+                const {
+                    month: nextMonth, year: nextYear,
+                } = getNextMonth(this.month, this.year);
 
-                this.month = month;
-                this.year = year;
-                this.calendarHeader = getHeaderForCalendarDaysType(month, year);
+                this.month = nextMonth;
+                this.year = nextYear;
+                this.calendarHeader = getHeaderForCalendarDaysType(nextMonth, nextYear);
 
                 break;
             }
diff --git a/components/Inputs/Date/DatePickerHeader.vue b/components/Inputs/Date/DatePickerHeader.vue
index b9e4ff875..97e2b1ac3 100644
--- a/components/Inputs/Date/DatePickerHeader.vue
+++ b/components/Inputs/Date/DatePickerHeader.vue
@@ -2,10 +2,6 @@
  * Copyright © Bold Brand Commerce Sp. z o.o. All rights reserved.
  * See LICENSE for license details.
  */
-/*
-* Copyright © Bold Brand Commerce Sp. z o.o. All rights reserved.
-* See LICENSE for license details.
-*/
 <template>
     <div class="header">
         <span v-text="header" />
diff --git a/components/Inputs/Date/DateRangePicker.vue b/components/Inputs/Date/DateRangePicker.vue
index b17678e38..231b89032 100644
--- a/components/Inputs/Date/DateRangePicker.vue
+++ b/components/Inputs/Date/DateRangePicker.vue
@@ -133,10 +133,12 @@ export default {
                 : this.upperBoundYear;
         },
         nextMonth() {
-            const { month, year } = getNextMonth(this.upperBoundMonth, this.upperBoundYear);
+            const {
+                month: nextMonth, year: nextYear,
+            } = getNextMonth(this.upperBoundMonth, this.upperBoundYear);
 
-            this.upperBoundMonth = month;
-            this.upperBoundYear = year;
+            this.upperBoundMonth = nextMonth;
+            this.upperBoundYear = nextYear;
             this.lowerBoundMonth = this.lowerBoundMonth < 12
                 ? this.lowerBoundMonth + 1
                 : 1;