Jennifer is right about your 1st point. For the 2nd, you should do something like #q32 img.ui-datepicker-trigger {display:none!important} in the CSS. For the 3rd part, I would use several bits of javascript to change the momentpattern attribute, perhaps set a placeholder text to give the user some guidance, and remove the hasDatepicker class from the input so the datepicker dialog doesn't show up either. All in all, you should have this:

CSS

#q32 input {font-size:18px}
#q32 img.ui-datepicker-trigger {display:none!important}

Javascript

$(document).ready(function(){
  $('#q32 input').attr('momentpattern','YYYY/MM/DD');
  $('#q32 input').attr('placeholder','YYYY/MM/DD');
  $('#q32 input').removeClass('hasDatepicker');
});