本地化日期选择器和时间选择器是根据用户所在地区的语言和日期格式进行定制的。下面是一个使用HTML、CSS和JavaScript实现本地化日期选择器和时间选择器的示例代码：

HTML代码：

选择日期:



选择时间:

CSS代码：

.ui-datepicker {
   font-size: 0.8em;
   width: 17em;
}

.ui-datepicker-calendar {
   display: none;
}

.ui-datepicker-inline {
   display: block;
}

.ui-datepicker-header {
   padding: 0.2em 0.2em 0.2em 0.2em;
   position: relative;
   background-color: #555;
   border: 1px solid #555;
   color: #EEE;
   font-weight: bold;
   font-size: 1em;
   text-align: center;
}

.ui-datepicker-title {
   margin: 0 2.3em;
   line-height: 2.5em;
   text-align: center;
}

.ui-datepicker-prev,
.ui-datepicker-next {
   position: absolute;
   top: 2px;
   width: 1.8em;
   height: 1.8em;
   cursor: pointer;
}

.ui-datepicker-prev {
   left: 2px;
}

.ui-datepicker-next {
   right: 2px;
}

.ui-datepicker-prev-hover,
.ui-datepicker-next-hover {
   background-position: 50% 50%;
   background-repeat: no-repeat;
}

.ui-datepicker-prev-hover {
   background-image: url("prev-hover.png");
}

.ui-datepicker-next-hover {
   background-image: url("next-hover.png");
}

.ui-datepicker-prev,
.ui-datepicker-next {
   text-indent: -9999px;
}

.ui-datepicker-prev span {
   display: block;
   position: absolute;
   left: 50%;
   margin-left: -8px;
   top: 50%;
   margin-top: -8px;
   height: 15px;
   width: 15px;
   background-image: url("prev.png");
}

.ui-datepicker-next span {
   display: block;
   position: absolute;
   left: 50%;
   margin-left: -8px;
   top: 50%;
   margin-top: -8px;
   height: 15px;
   width: 15px;
   background-image: url("next.png");
}

.ui-datepicker-calendar th,
.ui-datepicker-calendar td {
   padding: 0.3em;
   text-align: center;
}

.ui-datepicker-calendar td {
   border: 1px solid #555;
   font-size: 0.8em;
}

.ui-datepicker-calendar td:hover {
   background-color: #EEE;
   cursor: pointer;
}

.ui-datepicker-unselectable .ui-state-default {
   color: #888;
   cursor: default;
}

.ui-datepicker-unselectable .ui-state-highlight {
   color: #888;
   cursor: default;
   background-color: #EEE;
}

.ui-datepicker-current-day .ui-state-default {
   background-color: #FFF;
}

.ui-datepicker-calendar .ui-datepicker-today a {
   outline: none;
   background-color: #EEE;
   font-weight: bold;
   color: #FFF;
}

.ui-datepicker-calendar .ui-datepicker-week-end {
   background-color: #DDD;
}

JavaScript代码：

$(function() {
   $("#datepicker").datepicker({
      dateFormat: "yy-mm-dd",
      changeMonth: true,
      changeYear: true,
      minDate: "-1M",
      maxDate: "+1M",
      showButtonPanel: true,
      beforeShow: function(input) {
         $(input).datepicker("widget").addClass("ui-datepicker-inline");
         var today = new Date();
         var currentYear = today.getFullYear();
         var currentMonth = today.getMonth();
         if (currentYear > parseInt($(input).val().split('-')[0]) || (currentYear == parseInt($(input).val().split('-')[0]) && currentMonth > parseInt($(input).val().split('-')[1]) - 1)) {
            $(input).datepicker("setDate", today);
         }
      }
   });

   $("#timepicker").timepicker({
      timeFormat: "HH:mm",
      interval: 30,
      minTime: "00:00",
      maxTime: "23:30",
      defaultTime: "12:00",
      startTime: "00:00",
      dynamic: false,
      dropdown: true,
      scrollbar: true
   });
});

这段代码使用了jQuery UI库中