diff --git a/packages/@react-aria/calendar/src/useCalendarCell.ts b/packages/@react-aria/calendar/src/useCalendarCell.ts
index fa7c422987b..c1da41afb36 100644
--- a/packages/@react-aria/calendar/src/useCalendarCell.ts
+++ b/packages/@react-aria/calendar/src/useCalendarCell.ts
@@ -40,6 +40,8 @@ export interface CalendarCellAria {
   isPressed: boolean,
   /** Whether the cell is selected. */
   isSelected: boolean,
+  /** Whether the cell is read only. */
+  isReadOnly: boolean,
   /** Whether the cell is focused. */
   isFocused: boolean,
   /**
@@ -305,7 +307,8 @@ export function useCalendarCell(props: AriaCalendarCellProps, state: CalendarSta
       role: 'gridcell',
       'aria-disabled': !isSelectable || undefined,
       'aria-selected': isSelected || undefined,
-      'aria-invalid': isInvalid || undefined
+      'aria-invalid': isInvalid || undefined,
+      'aria-readonly': state.isReadOnly || undefined
     },
     buttonProps: mergeProps(pressProps, {
       onFocus() {
@@ -343,6 +346,7 @@ export function useCalendarCell(props: AriaCalendarCellProps, state: CalendarSta
     }),
     isPressed,
     isFocused,
+    isReadOnly: state.isReadOnly,
     isSelected,
     isDisabled,
     isUnavailable,
diff --git a/packages/react-aria-components/src/Calendar.tsx b/packages/react-aria-components/src/Calendar.tsx
index f3ed804b892..abd137a2437 100644
--- a/packages/react-aria-components/src/Calendar.tsx
+++ b/packages/react-aria-components/src/Calendar.tsx
@@ -262,6 +262,11 @@ export interface CalendarCellRenderProps {
    * @selector [data-selected]
    */
   isSelected: boolean,
+  /**
+   * Whether the cell is read only.
+   * @selector [data-readonly]
+   */
+  isReadOnly: boolean,
   /**
    * Whether the cell is the first date in a range selection.
    * @selector [data-selection-start]
@@ -541,7 +546,8 @@ export const CalendarCell = /*#__PURE__*/ (forwardRef as forwardRefType)(functio
     'data-selected': states.isSelected || undefined,
     'data-selection-start': isSelectionStart || undefined,
     'data-selection-end': isSelectionEnd || undefined,
-    'data-invalid': states.isInvalid || undefined
+    'data-invalid': states.isInvalid || undefined,
+    'data-readonly': states.isReadOnly || undefined
   };
 
   return (
diff --git a/packages/react-aria-components/test/Calendar.test.js b/packages/react-aria-components/test/Calendar.test.js
index ba590708101..f689d3cfb51 100644
--- a/packages/react-aria-components/test/Calendar.test.js
+++ b/packages/react-aria-components/test/Calendar.test.js
@@ -263,6 +263,18 @@ describe('Calendar', () => {
     expect(cell).toHaveClass('disabled');
   });
 
+  it('should support read only state', () => {
+    let {getByRole} = renderCalendar({isReadOnly: true}, {}, {className: ({isReadOnly}) => isReadOnly ? 'readonly' : ''});
+    let grid = getByRole('grid');
+    let cell = within(grid).getAllByRole('gridcell')[7];
+    let button = within(cell).getByRole('button');
+    
+  
+    expect(cell).toHaveAttribute('aria-readonly', 'true');
+    expect(button).toHaveAttribute('data-readonly');
+    expect(button).toHaveClass('readonly');
+  });
+
   it('should support invalid state', () => {
     let {getByRole} = renderCalendar({isInvalid: true, value: startOfWeek(startOfMonth(today(getLocalTimeZone())), 'en-US').add({days: 7})}, {}, {className: ({isInvalid}) => isInvalid ? 'invalid' : ''});
     let grid = getByRole('grid');