Hi pdfjs team,

Please find attach a really simple pdf file to reproduce the issue.
[Date.pdf](https://github.com/mozilla/pdf.js/files/8242310/Date.pdf)
This pdf contains 4 date fields, One with a default format (dd/mm/yyyy) and the 3 others with custom formats:

    -  dd
    -  mm
    -  yyyy

The expected behavior is that whenever I fill dd field with 16 for instance, then when i focus out that field the value displayed is 16 but I get 01.

This happens for dd field and mm but it's working fine for dd/mm/yyyy and yyyy fields.

The initial values of the pdf are properly displayed, this happens only if I focus one of those fields.

Thank you for your time

Best regards.

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        expect(send_queue.has(refId)).toEqual(false);
        await sandbox.dispatchEventInSandbox({
          id: refId,
          value: "3",
          change: "F",
          name: "Keystroke",
          willCommit: false,
          selStart: 1,
          selEnd: 1,
        });
        expect(send_queue.has(refId)).toEqual(false);
        await sandbox.dispatchEventInSandbox({
          id: refId,
          value: "3F",
          change: "?",
          name: "Keystroke",
          willCommit: false,
          selStart: 2,
          selEnd: 2,
        });
        expect(send_queue.has(refId)).toEqual(false);
        await sandbox.dispatchEventInSandbox({
          id: refId,
          value: "3F?",
          change: "@",
          name: "Keystroke",
          willCommit: false,
          selStart: 3,
          selEnd: 3,