fixed dayjs another local and calendar

packages/@mantine/dates/src/components/Day/Day.tsx

@@ -139,7 +139,7 @@ export const Day = factory<DayFactory>((_props, ref) => {
       unstyled={unstyled}
       {...others}
     >
-      {renderDay?.(date) || date.getDate()}
+      {renderDay?.(date) || dayjs(date).date()}
     </UnstyledButton>
   );
 });

packages/@mantine/dates/src/components/Month/get-end-of-week/get-end-of-week.ts

@@ -1,12 +1,13 @@
+import dayjs from 'dayjs';
 import type { DayOfWeek } from '../../../types';
 
 export function getEndOfWeek(date: Date, firstDayOfWeek: DayOfWeek = 1) {
-  const value = new Date(date);
-  const lastDayOfWeek = firstDayOfWeek === 0 ? 6 : firstDayOfWeek - 1;
+  let value = dayjs(date)
 
-  while (value.getDay() !== lastDayOfWeek) {
-    value.setDate(value.getDate() + 1);
+  const lastDayOfWeek = firstDayOfWeek === 0 ? 6 : firstDayOfWeek - 1;
+  while (value.day() !== lastDayOfWeek) {
+    value = value.add(1, 'day');
   }
 
-  return value;
+  return value.toDate();
 }

packages/@mantine/dates/src/components/Month/get-month-days/get-month-days.ts

@@ -1,3 +1,4 @@
+import dayjs from 'dayjs';
 import { DayOfWeek } from '../../../types';
 import { getEndOfWeek } from '../get-end-of-week/get-end-of-week';
 import { getStartOfWeek } from '../get-start-of-week/get-start-of-week';
@@ -13,9 +14,10 @@ export function getMonthDays({
   firstDayOfWeek = 1,
   consistentWeeks,
 }: GetMonthDaysInput): Date[][] {
-  const currentMonth = month.getMonth();
-  const startOfMonth = new Date(month.getFullYear(), currentMonth, 1);
-  const endOfMonth = new Date(month.getFullYear(), month.getMonth() + 1, 0);
+  const day = dayjs(month)
+  const start = day.subtract(day.date() - 1, 'day')
+  const startOfMonth = start.toDate();
+  const endOfMonth = start.add(+ day.daysInMonth() - 1, 'day').toDate();
   const endDate = getEndOfWeek(endOfMonth, firstDayOfWeek);
   const date = getStartOfWeek(startOfMonth, firstDayOfWeek);
   const weeks: Date[][] = [];

packages/@mantine/dates/src/components/Month/get-start-of-week/get-start-of-week.ts

@@ -1,11 +1,11 @@
+import dayjs from 'dayjs';
 import type { DayOfWeek } from '../../../types';
 
 export function getStartOfWeek(date: Date, firstDayOfWeek: DayOfWeek = 1) {
-  const value = new Date(date);
-
-  while (value.getDay() !== firstDayOfWeek) {
-    value.setDate(value.getDate() - 1);
+  let value = dayjs(date);
+  while (value.day() !== firstDayOfWeek) {
+    value = value.subtract(1, 'day');
   }
 
-  return value;
+  return value.toDate();
 }

packages/@mantine/dates/src/components/Month/is-same-month/is-same-month.ts

@@ -1,5 +1,9 @@
+import dayjs from "dayjs";
+
 export function isSameMonth(date: Date, comparison: Date) {
+  const dayDate = dayjs(date)
+  const dayComparison = dayjs(comparison)
   return (
-    date.getFullYear() === comparison.getFullYear() && date.getMonth() === comparison.getMonth()
+    dayDate.year() === dayComparison.year() && dayDate.month() === dayComparison.month()
   );
-}
+}