$(document).ready(function() {
  var now = new Date();
  var hour = now.getHours();
  var textElement = $('#greeting'); // 假设有一个id为greeting的元素
  
  if (hour < 12) {
    textElement.text('早上好！');
  } else if (hour < 18) {
    textElement.text('下午好！');
  } else {
    textElement.text('晚上好！');
  }
});

$(document).ready(function() {
  var days = ['星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'];
  var now = new Date();
  var day = now.getDay();
  
  $('#weekday').text('今天是' + days[day]);
});

$(document).ready(function() {
  var now = new Date();
  var month = now.getMonth() + 1; // 月份从0开始
  var date = now.getDate();
  
  if (month === 12 && date === 25) {
    $('#special-message').text('圣诞快乐！');
  } else if (month === 1 && date === 1) {
    $('#special-message').text('新年快乐！');
  }
});

$(document).ready(function() {
  function updateCountdown() {
    var now = new Date();
    var target = new Date(now.getFullYear(), now.getMonth(), now.getDate() + 1); // 明天
    var diff = target - now;
    
    var hours = Math.floor(diff / (1000 * 60 * 60));
    var minutes = Math.floor((diff % (1000 * 60 * 60)) / (1000 * 60));
    var seconds = Math.floor((diff % (1000 * 60)) / 1000);
    
    $('#countdown').text('距离明天还有: ' + hours + '小时 ' + minutes + '分钟 ' + seconds + '秒');
  }
  
  updateCountdown();
  setInterval(updateCountdown, 1000);
});

$(document).ready(function() {
  var now = new Date();
  var month = now.getMonth() + 1;
  var season;
  
  if (month >= 3 && month <= 5) {
    season = '春季';
  } else if (month >= 6 && month <= 8) {
    season = '夏季';
  } else if (month >= 9 && month <= 11) {
    season = '秋季';
  } else {
    season = '冬季';
  }
  
  $('#season-message').text('当前是' + season + '，请注意天气变化！');
});

// 使用本地时间
var now = new Date();

// 如果需要特定时区
var options = { timeZone: 'Asia/Shanghai' };
var localTime = new Date().toLocaleString('zh-CN', options);

function updateTime() {
  var now = new Date();
  $('#current-time').text(now.toLocaleTimeString());
  requestAnimationFrame(updateTime);
}

$(document).ready(function() {
  requestAnimationFrame(updateTime);
});

function formatDate(date) {
  var year = date.getFullYear();
  var month = ('0' + (date.getMonth() + 1)).slice(-2);
  var day = ('0' + date.getDate()).slice(-2);
  return year + '-' + month + '-' + day;
}

$(document).ready(function() {
  $('#formatted-date').text(formatDate(new Date()));
});