diff --git a/packages/lab/src/__tests__/__e2e__/date-picker/DatePicker.single.cy.tsx b/packages/lab/src/__tests__/__e2e__/date-picker/DatePicker.single.cy.tsx
index a1e771ad29..9f807ffdeb 100644
--- a/packages/lab/src/__tests__/__e2e__/date-picker/DatePicker.single.cy.tsx
+++ b/packages/lab/src/__tests__/__e2e__/date-picker/DatePicker.single.cy.tsx
@@ -90,6 +90,11 @@ describe("GIVEN a DatePicker where selectionVariant is single", () => {
       cy.findByRole("textbox").click().type("{downArrow}", { force: true });
       cy.findByRole("application").should("not.exist");
     });
+
+    it("SHOULD not open overlay if defaultOpen is set", () => {
+      cy.mount(<Single readOnly defaultOpen/>);
+      cy.findByRole("application").should("not.exist");
+    });
   });
 
   adapters.forEach((adapter: SaltDateAdapter<DateFrameworkType>) => {
@@ -483,7 +488,7 @@ describe("GIVEN a DatePicker where selectionVariant is single", () => {
 
         it("SHOULD be able to enable the overlay to open on click", () => {
           cy.mount(
-            <UncontrolledOpen openOnClick defaultSelectedDate={initialDate} />,
+            <Single openOnClick defaultSelectedDate={initialDate} />,
           );
           cy.findByRole("application").should("not.exist");
           // Simulate opening the calendar on click
@@ -504,7 +509,7 @@ describe("GIVEN a DatePicker where selectionVariant is single", () => {
 
         it("SHOULD be able to enable the overlay to open on keydown", () => {
           cy.mount(
-            <UncontrolledOpen
+            <Single
               openOnKeyDown
               defaultSelectedDate={initialDate}
             />,
@@ -530,7 +535,7 @@ describe("GIVEN a DatePicker where selectionVariant is single", () => {
 
         it("SHOULD be able to enable the overlay to open on focus", () => {
           cy.mount(
-            <UncontrolledOpen openOnFocus defaultSelectedDate={initialDate} />,
+            <Single openOnFocus defaultSelectedDate={initialDate} />,
           );
           cy.findByRole("application").should("not.exist");
           // Simulate opening the calendar on focus
diff --git a/packages/lab/src/date-picker/DatePickerOverlayProvider.tsx b/packages/lab/src/date-picker/DatePickerOverlayProvider.tsx
index 6a8f30cf3e..2b2e6565eb 100644
--- a/packages/lab/src/date-picker/DatePickerOverlayProvider.tsx
+++ b/packages/lab/src/date-picker/DatePickerOverlayProvider.tsx
@@ -126,7 +126,7 @@ export const DatePickerOverlayProvider: React.FC<
   open: openProp,
   openOnClick,
   openOnFocus,
-  openOnKeyDown,
+  openOnKeyDown = true,
   defaultOpen,
   onOpen,
   children,
@@ -135,7 +135,7 @@ export const DatePickerOverlayProvider: React.FC<
 }) => {
   const [open, setOpenState, isOpenControlled] = useControlled({
     controlled: openProp,
-    default: Boolean(defaultOpen),
+    default: readOnly ? false : Boolean(defaultOpen),
     name: "DatePicker",
     state: "openDatePickerOverlay",
   });
@@ -146,7 +146,6 @@ export const DatePickerOverlayProvider: React.FC<
     (newOpen: boolean, _event?: Event, reason?: OpenChangeReason) => {
       if (newOpen) {
         if (readOnly) {
-          // When not open overlay when readOnly
           return;
         }
         triggeringElement.current = document.activeElement as HTMLElement;
@@ -192,11 +191,11 @@ export const DatePickerOverlayProvider: React.FC<
       : [
           useDismiss(floatingUIResult.context),
           useFocus(floatingUIResult.context, {
-            enabled: !!openOnFocus,
+            enabled: !!openOnFocus && !readOnly,
           }),
-          useKeyboard(floatingUIResult.context, { enabled: !!openOnKeyDown }),
+          useKeyboard(floatingUIResult.context, { enabled: !!openOnKeyDown && !readOnly }),
           useClick(floatingUIResult.context, {
-            enabled: !!openOnClick,
+            enabled: !!openOnClick && !readOnly,
             toggle: false,
           }),
         ],