sample.erb

<% # assuming the times are stored in @time1 %>

<script>
  $(document).ready(function(){
    date = new Date(<%= @time1.iso8601 %>);
    $('.my_timezone_container').html(date.toString());
  });

  // or maybe use moment
  $(document).ready(function(){
    date = moment(<%= @time1.iso8601 %>);
    $('.my_timezone_container').html(date.format('mm/dd/yyyy hh:mm');
  });

</script>

<div class="my_timezone_container"></div>