Empty table header

[jbarrantes]

Currently goog.ui.DatePicker renders an empty <th> in the calendar header. This accessibility issue can be found via the WAVE extension:

The recommendations by WAVE, if the cell must remain empty is to make the cell a <td> rather than a <th>.

[shicks]

Thanks for reporting this. The goog.ui library is more or less unmaintained and not recommended at this point. We'd consider merging a PR to fix this, but will not work on it ourselves.