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.

this.AFDate_FormatEx(cFormat);
  }
  AFTime_Format(pdf) {
    if (pdf >= 0 && pdf < this._timeFormats.length) {
      this.AFDate_FormatEx(this._timeFormats[pdf]);
    }
  }
  AFTime_KeystrokeEx(cFormat) {
    this.AFDate_KeystrokeEx(cFormat);
  }
  AFTime_Keystroke(pdf) {
    if (pdf >= 0 && pdf < this._timeFormats.length) {
      this.AFDate_KeystrokeEx(this._timeFormats[pdf]);
    }
  }
  eMailValidate(str) {
    return this._emailRegex.test(str);
  }
}
export { AForm };