diff --git a/.changeset/calm-steaks-agree.md b/.changeset/calm-steaks-agree.md
new file mode 100644
index 0000000..6c69f06
--- /dev/null
+++ b/.changeset/calm-steaks-agree.md
@@ -0,0 +1,5 @@
+---
+"@openfun/cunningham-react": minor
+---
+
+make DatePicker placeholders uppercase
diff --git a/packages/react/src/components/Forms/DatePicker/DateField.tsx b/packages/react/src/components/Forms/DatePicker/DateField.tsx
index f6681ab..cab1016 100644
--- a/packages/react/src/components/Forms/DatePicker/DateField.tsx
+++ b/packages/react/src/components/Forms/DatePicker/DateField.tsx
@@ -37,7 +37,7 @@ const DateSegmentInput = ({
           (currentSegment.type === "literal" && previousSegment?.isPlaceholder),
       })}
     >
-      {currentSegment.text}
+      {currentSegment.text?.toUpperCase()}
     </div>
   );
 };
diff --git a/packages/react/src/components/Forms/DatePicker/DatePicker.spec.tsx b/packages/react/src/components/Forms/DatePicker/DatePicker.spec.tsx
index 86f2787..25a983a 100644
--- a/packages/react/src/components/Forms/DatePicker/DatePicker.spec.tsx
+++ b/packages/react/src/components/Forms/DatePicker/DatePicker.spec.tsx
@@ -420,7 +420,7 @@ describe("<DatePicker/>", () => {
 
     // Date field's value should be set to a placeholder value.
     const dateFieldContent = screen.getByRole("presentation").textContent;
-    expect(dateFieldContent).eq("mm/dd/yyyy");
+    expect(dateFieldContent).eq("MM/DD/YYYY");
 
     const isGridCellSelected = screen
       .getByRole("gridcell", { name: "24" })!
diff --git a/packages/react/src/components/Forms/DatePicker/DateRangePicker.spec.tsx b/packages/react/src/components/Forms/DatePicker/DateRangePicker.spec.tsx
index a860d1b..026db58 100644
--- a/packages/react/src/components/Forms/DatePicker/DateRangePicker.spec.tsx
+++ b/packages/react/src/components/Forms/DatePicker/DateRangePicker.spec.tsx
@@ -743,8 +743,8 @@ describe("<DateRangePicker/>", () => {
 
     // Date field's value should be set to a placeholder value.
     const [startInput, endInput] = await screen.queryAllByRole("presentation");
-    expect(startInput.textContent).eq("mm/dd/yyyy");
-    expect(endInput.textContent).eq("mm/dd/yyyy");
+    expect(startInput.textContent).eq("MM/DD/YYYY");
+    expect(endInput.textContent).eq("MM/DD/YYYY");
 
     const startGridCell = screen.getByRole("gridcell", {
       name: "25",