Hi Terri,

I can reproduce the issue and have passed this on to the development team. Based on the behaviors among different browsers, it seems that the tab order is being decided based on the rendering of the date picker, and so it's possible that this might not be able to be changed; we can try to look into at least making the behavior consistent. (I haven't tested extensively to see if it behaved the same in other versions of Forms.)

However I do have good news, you can use the following jQuery snippet to fix this:

$(document).ready(function() {
  $('input.hasDatepicker').on('change',function() {$(this).focus();});
});

With this code, every time a Date field (precisely, every input element that has an associated date picker) changes value, the browser focus will be forced to that input field. The tab order should then proceed as though the value had been entered without using the date picker.

Hope this helps!