diff --git a/packages/react-calendar/src/Calendar.tsx b/packages/react-calendar/src/Calendar.tsx
index 498e99f1..5e369c05 100644
--- a/packages/react-calendar/src/Calendar.tsx
+++ b/packages/react-calendar/src/Calendar.tsx
@@ -16,7 +16,6 @@ import type {
   Action,
   CalendarType,
   ClassName,
-  DeprecatedCalendarType,
   Detail,
   LooseValue,
   NavigationLabelFunc,
@@ -69,7 +68,7 @@ export type CalendarProps = {
    *
    * @example 'iso8601'
    */
-  calendarType?: CalendarType | DeprecatedCalendarType;
+  calendarType?: CalendarType;
   /**
    * Class name(s) that will be added along with `"react-calendar"` to the main react-calendar `<div>` element.
    *
diff --git a/packages/react-calendar/src/MonthView.tsx b/packages/react-calendar/src/MonthView.tsx
index a4cd0275..5ce4241d 100644
--- a/packages/react-calendar/src/MonthView.tsx
+++ b/packages/react-calendar/src/MonthView.tsx
@@ -6,7 +6,7 @@ import WeekNumbers from './MonthView/WeekNumbers.js';
 
 import { CALENDAR_TYPES, CALENDAR_TYPE_LOCALES } from './shared/const.js';
 
-import type { CalendarType, DeprecatedCalendarType } from './shared/types.js';
+import type { CalendarType } from './shared/types.js';
 
 function getCalendarTypeFromLocale(locale: string | undefined): CalendarType {
   if (locale) {
@@ -26,7 +26,7 @@ type MonthViewProps = {
    *
    * @example 'iso8601'
    */
-  calendarType?: CalendarType | DeprecatedCalendarType;
+  calendarType?: CalendarType;
   /**
    *  Whether week numbers shall be shown at the left of MonthView or not.
    *
diff --git a/packages/react-calendar/src/MonthView/Day.tsx b/packages/react-calendar/src/MonthView/Day.tsx
index 52962ad8..5c705c55 100644
--- a/packages/react-calendar/src/MonthView/Day.tsx
+++ b/packages/react-calendar/src/MonthView/Day.tsx
@@ -9,7 +9,7 @@ import {
 } from '../shared/dateFormatter.js';
 import { mapCalendarType } from '../shared/utils.js';
 
-import type { CalendarType, DeprecatedCalendarType } from '../shared/types.js';
+import type { CalendarType } from '../shared/types.js';
 
 const className = 'react-calendar__month-view__days__day';
 
@@ -19,7 +19,7 @@ type DayProps = {
    *
    * @example 'iso8601'
    */
-  calendarType: CalendarType | DeprecatedCalendarType | undefined;
+  calendarType: CalendarType | undefined;
   classes?: string[];
   currentMonthIndex: number;
   /**
@@ -40,14 +40,13 @@ type DayProps = {
 >;
 
 export default function Day({
-  calendarType: calendarTypeOrDeprecatedCalendarType,
+  calendarType,
   classes = [],
   currentMonthIndex,
   formatDay = defaultFormatDay,
   formatLongDate = defaultFormatLongDate,
   ...otherProps
 }: DayProps) {
-  const calendarType = mapCalendarType(calendarTypeOrDeprecatedCalendarType);
   const { date, locale } = otherProps;
 
   const classesProps: string[] = [];
diff --git a/packages/react-calendar/src/MonthView/Days.tsx b/packages/react-calendar/src/MonthView/Days.tsx
index a3d05be3..0c0b9f89 100644
--- a/packages/react-calendar/src/MonthView/Days.tsx
+++ b/packages/react-calendar/src/MonthView/Days.tsx
@@ -4,9 +4,8 @@ import TileGroup from '../TileGroup.js';
 import Day from './Day.js';
 
 import { getDayOfWeek } from '../shared/dates.js';
-import { mapCalendarType } from '../shared/utils.js';
 
-import type { CalendarType, DeprecatedCalendarType } from '../shared/types.js';
+import type { CalendarType } from '../shared/types.js';
 
 type DaysProps = {
   /**
@@ -20,7 +19,7 @@ type DaysProps = {
    *
    * @example 'iso8601'
    */
-  calendarType: CalendarType | DeprecatedCalendarType | undefined;
+  calendarType: CalendarType | undefined;
   /**
    * Whether to always show fixed number of weeks (6). Forces `showNeighboringMonth` prop to be `true`.
    *
@@ -44,7 +43,7 @@ type DaysProps = {
 export default function Days(props: DaysProps) {
   const {
     activeStartDate,
-    calendarType: calendarTypeOrDeprecatedCalendarType,
+    calendarType,
     hover,
     showFixedNumberOfWeeks,
     showNeighboringMonth,
@@ -53,7 +52,6 @@ export default function Days(props: DaysProps) {
     ...otherProps
   } = props;
 
-  const calendarType = mapCalendarType(calendarTypeOrDeprecatedCalendarType);
   const year = getYear(activeStartDate);
   const monthIndex = getMonth(activeStartDate);
 
@@ -111,7 +109,7 @@ export default function Days(props: DaysProps) {
           {...otherProps}
           {...otherTileProps}
           activeStartDate={activeStartDate}
-          calendarType={calendarTypeOrDeprecatedCalendarType}
+          calendarType={calendarType}
           currentMonthIndex={monthIndex}
           date={date}
         />
diff --git a/packages/react-calendar/src/MonthView/WeekNumbers.tsx b/packages/react-calendar/src/MonthView/WeekNumbers.tsx
index ea5726e5..9c343f6c 100644
--- a/packages/react-calendar/src/MonthView/WeekNumbers.tsx
+++ b/packages/react-calendar/src/MonthView/WeekNumbers.tsx
@@ -4,13 +4,8 @@ import WeekNumber from './WeekNumber.js';
 import Flex from '../Flex.js';
 
 import { getBeginOfWeek, getDayOfWeek, getWeekNumber } from '../shared/dates.js';
-import { mapCalendarType } from '../shared/utils.js';
 
-import type {
-  CalendarType,
-  DeprecatedCalendarType,
-  OnClickWeekNumberFunc,
-} from '../shared/types.js';
+import type { CalendarType, OnClickWeekNumberFunc } from '../shared/types.js';
 
 type WeekNumbersProps = {
   /**
@@ -24,7 +19,7 @@ type WeekNumbersProps = {
    *
    * @example 'iso8601'
    */
-  calendarType: CalendarType | DeprecatedCalendarType | undefined;
+  calendarType: CalendarType | undefined;
   /**
    * Function called when the user clicks a week number.
    *
@@ -42,15 +37,9 @@ type WeekNumbersProps = {
 };
 
 export default function WeekNumbers(props: WeekNumbersProps) {
-  const {
-    activeStartDate,
-    calendarType: calendarTypeOrDeprecatedCalendarType,
-    onClickWeekNumber,
-    onMouseLeave,
-    showFixedNumberOfWeeks,
-  } = props;
+  const { activeStartDate, calendarType, onClickWeekNumber, onMouseLeave, showFixedNumberOfWeeks } =
+    props;
 
-  const calendarType = mapCalendarType(calendarTypeOrDeprecatedCalendarType);
   const numberOfWeeks = (() => {
     if (showFixedNumberOfWeeks) {
       return 6;
diff --git a/packages/react-calendar/src/MonthView/Weekdays.tsx b/packages/react-calendar/src/MonthView/Weekdays.tsx
index f2734ce8..87bf37d7 100644
--- a/packages/react-calendar/src/MonthView/Weekdays.tsx
+++ b/packages/react-calendar/src/MonthView/Weekdays.tsx
@@ -8,9 +8,8 @@ import {
   formatShortWeekday as defaultFormatShortWeekday,
   formatWeekday as defaultFormatWeekday,
 } from '../shared/dateFormatter.js';
-import { mapCalendarType } from '../shared/utils.js';
 
-import type { CalendarType, DeprecatedCalendarType } from '../shared/types.js';
+import type { CalendarType } from '../shared/types.js';
 
 const className = 'react-calendar__month-view__weekdays';
 const weekdayClassName = `${className}__weekday`;
@@ -21,7 +20,7 @@ type WeekdaysProps = {
    *
    * @example 'iso8601'
    */
-  calendarType: CalendarType | DeprecatedCalendarType | undefined;
+  calendarType: CalendarType | undefined;
   /**
    * Function called to override default formatting of weekday names (shortened). Can be used to use your own formatting function.
    *
@@ -45,14 +44,13 @@ type WeekdaysProps = {
 
 export default function Weekdays(props: WeekdaysProps) {
   const {
-    calendarType: calendarTypeOrDeprecatedCalendarType,
+    calendarType,
     formatShortWeekday = defaultFormatShortWeekday,
     formatWeekday = defaultFormatWeekday,
     locale,
     onMouseLeave,
   } = props;
 
-  const calendarType = mapCalendarType(calendarTypeOrDeprecatedCalendarType);
   const anyDate = new Date();
   const beginOfMonth = getMonthStart(anyDate);
   const year = getYear(beginOfMonth);
diff --git a/packages/react-calendar/src/shared/const.ts b/packages/react-calendar/src/shared/const.ts
index e214a377..fc519b6e 100644
--- a/packages/react-calendar/src/shared/const.ts
+++ b/packages/react-calendar/src/shared/const.ts
@@ -5,13 +5,6 @@ export const CALENDAR_TYPES = {
   ISO_8601: 'iso8601',
 } as const;
 
-export const DEPRECATED_CALENDAR_TYPES = {
-  ARABIC: 'Arabic',
-  HEBREW: 'Hebrew',
-  ISO_8601: 'ISO 8601',
-  US: 'US',
-} as const;
-
 export const CALENDAR_TYPE_LOCALES = {
   [CALENDAR_TYPES.GREGORY]: [
     'en-CA',
diff --git a/packages/react-calendar/src/shared/types.ts b/packages/react-calendar/src/shared/types.ts
index 4d5fb24d..78b8ab63 100644
--- a/packages/react-calendar/src/shared/types.ts
+++ b/packages/react-calendar/src/shared/types.ts
@@ -1,4 +1,4 @@
-import type { CALENDAR_TYPES, DEPRECATED_CALENDAR_TYPES } from './const.js';
+import type { CALENDAR_TYPES } from './const.js';
 
 export type Range<T> = [T, T];
 
@@ -8,9 +8,6 @@ export type CalendarType = (typeof CALENDAR_TYPES)[keyof typeof CALENDAR_TYPES];
 
 export type ClassName = string | null | undefined | (string | null | undefined)[];
 
-export type DeprecatedCalendarType =
-  (typeof DEPRECATED_CALENDAR_TYPES)[keyof typeof DEPRECATED_CALENDAR_TYPES];
-
 export type Detail = 'century' | 'decade' | 'year' | 'month';
 
 type LooseValuePiece = string | Date | null;
diff --git a/packages/react-calendar/src/shared/utils.ts b/packages/react-calendar/src/shared/utils.ts
index 77862b6a..888f0418 100644
--- a/packages/react-calendar/src/shared/utils.ts
+++ b/packages/react-calendar/src/shared/utils.ts
@@ -1,9 +1,6 @@
-import warning from 'warning';
-
-import { CALENDAR_TYPES, DEPRECATED_CALENDAR_TYPES } from './const.js';
 import { getRange } from './dates.js';
 
-import type { CalendarType, DeprecatedCalendarType, Range, RangeType, Value } from './types.js';
+import type { Range, RangeType, Value } from './types.js';
 
 /**
  * Returns a value no smaller than min and no larger than max.
@@ -155,37 +152,3 @@ export function getTileClasses(args: {
 
   return classes;
 }
-
-const calendarTypeMap: Record<DeprecatedCalendarType, CalendarType> = {
-  [DEPRECATED_CALENDAR_TYPES.ARABIC]: CALENDAR_TYPES.ISLAMIC,
-  [DEPRECATED_CALENDAR_TYPES.HEBREW]: CALENDAR_TYPES.HEBREW,
-  [DEPRECATED_CALENDAR_TYPES.ISO_8601]: CALENDAR_TYPES.ISO_8601,
-  [DEPRECATED_CALENDAR_TYPES.US]: CALENDAR_TYPES.GREGORY,
-};
-
-function isDeprecatedCalendarType(
-  calendarType: CalendarType | DeprecatedCalendarType | undefined,
-): calendarType is DeprecatedCalendarType {
-  return calendarType !== undefined && calendarType in DEPRECATED_CALENDAR_TYPES;
-}
-
-let warned = false;
-
-export function mapCalendarType(
-  calendarTypeOrDeprecatedCalendarType?: CalendarType | DeprecatedCalendarType,
-): CalendarType | undefined {
-  if (isDeprecatedCalendarType(calendarTypeOrDeprecatedCalendarType)) {
-    const calendarType = calendarTypeMap[calendarTypeOrDeprecatedCalendarType];
-
-    warning(
-      warned,
-      `Specifying calendarType="${calendarTypeOrDeprecatedCalendarType}" is deprecated. Use calendarType="${calendarType}" instead.`,
-    );
-
-    warned = true;
-
-    return calendarType;
-  }
-
-  return calendarTypeOrDeprecatedCalendarType;
-}