如何在javascript中的另一个旁边添加属性值？

Question

我正在处理如下所示的html代码：

<div class="schedule-wrapper" id="js-schedule-wrapper" data-timezone="et">   <!-- when timezone et is selected from the ui, then data-timezone="et" displays here -->
<div class="schedule-show">
   <div class="schedule-show-time">
      <time datetime="12:15 15-04-2019" data-timezone="pt">12:15</time>    <!-- date is here 15-04-2019 -->
      <time datetime="13:15 15-04-2019" data-timezone="mt">13:15</time>    <!-- date is here 15-04-2019 -->
      <time datetime="15:15 15-04-2019" data-timezone="et">15:15</time>    <!-- date is here 15-04-2019 -->
   </div> 
   <div class="schedule-show-details">
      <h2 class="schedule-show-name" tabindex="0">
         Public Record
         <span class="cpac-icon cpac-icon-chevron-thin-right" aria-hidden="true" style="background-image: none;">
            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
               <path d="M21.2 16L9.774 4.128a1.114 1.114 0 0 1 0-1.566 1.089 1.089 0 0 1 1.55 0l12.528 12.653a1.114 1.114 0 0 1 0 1.566L11.324 29.434a1.087 1.087 0 0 1-1.55 0 1.114 1.114 0 0 1 0-1.566L21.2 16.001z"></path>
            </svg>
         </span>
      </h2>
   </div>
</div>
</div>

上面的HTML代码属于以下屏幕截图：

问题陈述： 我想知道我需要添加什么脚本，以便日期也可以按时间显示。

这是我尝试过的：

<script>
    jQuery(function ($) {
        $( "#js-schedule-wrapper" ).click(function() {
            if( $('#js-schedule-wrapper').attr('data-timezone') === 'et') {
                console.log( $(".schedule-show .schedule-show-time time").attr('datetime') );
                return false;
            }
            else if( $('#js-schedule-wrapper').attr('data-timezone') === 'pt') {
                if ($('.schedule-show .schedule-show-time time').attr('data-timezone') === 'pt') {
                    console.log( $(".schedule-show .schedule-show-time time").attr('datetime') );
                    return false;
                }
            }
            else if( $('#js-schedule-wrapper').attr('data-timezone') === 'mt') {
                if ($('.schedule-show .schedule-show-time time').attr('data-timezone') === 'mt') {
                    console.log( $(".schedule-show .schedule-show-time time").attr('datetime') );
                    return false;
                }
            }
        })
    })
</script>