app/assets/javascripts/bootstrap-datepicker-rails.js
$(function() {
return $(document).on('changeDate', '.bootstrap-datepicker', function(evt) {
var rails_date;
rails_date = evt.date.getFullYear() + '-' + ('0' + (evt.date.getMonth() + 1)).slice(-2) + '-' + ('0' + evt.date.getDate()).slice(-2);
return $(this).next("input[type=hidden]").val(rails_date);
});
});