Date format as rendered by Atlassian Document Format

Forge
1

I am building a confluence macro that returns a date in date format. I generate the date format by using the AdfRenderer from @forge/react like this:

import React, { useEffect, useState } from 'react';
import ForgeReconciler, {
  AdfRenderer,
  useConfig,
  Label,
  useProductContext,
  DatePicker,
  Text
} from '@forge/react';



const today = new Date().toISOString().split('T')[0];
const toTimestamp = (dateString) => {
  if (!dateString) return Date.now().toString();
  const d = new Date(dateString);
  return isNaN(d.getTime()) ? Date.now().toString() : d.getTime().toString();
};
const Config = () => {
  return (
    <>
      <Label>Define date</Label>
      <DatePicker
        name="datepicker"
        isRequired
        defaultValue={today}
      />
    </>
  );
};


const App = () => {
  const config = useConfig();
  const dateValue = config?.datepicker;

  const timestamp = toTimestamp(dateValue);

  // Always render the REAL ADF in view mode

  const actualADF = {
    type: "doc",
    version: 1,
    content: [
      {
        type: "paragraph",
        content: [
          {
            type: "date",
            attrs: { timestamp: timestamp }
          }
        ]
      }
    ]
  };
  return (
    <>
      <AdfRenderer document={actualADF}
      />
    </>
  );
};


ForgeReconciler.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);

// UI Kit config registration
ForgeReconciler.addConfig(<Config />);

Everything works well, except for the problem that the rendered data is always in MMM DD, YYYY format (e.g., Feb 10, 2026). I have tried changing the global date configuration in Confluence, my Atlassian account’s language, my browser’s language, but all had no effect. Only the built-in date macro in Confluence changed as my configuration changed, but the value as rendered by the Forge macro stays the same no matter what I do.

Could someone please advise how I can get the rendered date in the format of DD.MM.YYYY for example?

Thank you very much!