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.

command: "alert",
          value:
            "Invalid value: must be greater than or equal to 123 and less than or equal to 456.",
        });
      });
    });
    describe("ASSimple_Calculate", function () {
      it("should compute the sum of several fields", async () => {
        const refIds = [0, 1, 2, 3].map(_ => getId());
        const data = {
          objects: {
            field1: [
              {
                id: refIds[0],
                value: "",
                actions: {},
                type: "text",
              },
            ],
            field2: [
              {
                id: refIds[1],
                value: "",
                actions: {},
                type: "text",
              },
            ],
            field3: [
              {
                id: refIds[2],