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.

},
          ],
        },
        appInfo: { language: "en-US", platform: "Linux x86_64" },
        calculationOrder: [refId2],
      };
      sandbox.createSandbox(data);
      await sandbox.dispatchEventInSandbox({
        id: refId1,
        value: "hello",
        name: "Keystroke",
        willCommit: true,
      });
      expect(send_queue.has(refId1)).toEqual(true);
      expect(send_queue.get(refId1)).toEqual({
        id: refId1,
        value: "world",
        valueAsString: "world",
      });
    });
  });
  describe("Color", function () {
    beforeAll(function () {
      sandbox.createSandbox({
        appInfo: { language: "en-US", platform: "Linux x86_64" },
        objects: {},
        calculationOrder: [],
      });
    });
    function round(color) {