📆 闰年判断Leap Year Checker
判断某一年是否为闰年，并列出前后最近的闰年和该年天数、二月天数。Check if a year is a leap year and list nearby leap years.
使用说明与常见问题How-to & FAQ
「闰年判断」是什么？What is the Leap Year Checker?
判断某一年是否为闰年，并列出前后最近的闰年和该年天数、二月天数。Check if a year is a leap year and list nearby leap years.
如何使用「闰年判断」？How do I use the Leap Year Checker?
在「闰年判断」中，填写「年份」等参数，结果会随输入实时计算并显示在下方。In the Leap Year Checker: Fill in "Year"; results are recalculated instantly as you type.
时区如何处理？How are time zones handled?
「闰年判断」默认使用你设备的本地时区（按浏览器设置），夏令时由浏览器自动处理。The Leap Year Checker uses your device's local time zone by default, and daylight saving time is handled by the browser.
「闰年判断」免费吗？需要注册吗？Is the Leap Year Checker free? Do I need an account?
「闰年判断」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Leap Year Checker is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.
相关工具Related tools
⏳ 倒计时（距离某日还有几天）Countdown to Date⏱️ 在线秒表Online Stopwatch⏲️ 在线计时器（倒计时提醒）Online Countdown Timer🍅 番茄钟Pomodoro Timer📅 万年历 / 日历生成Printable Calendar Generator📆 星期几查询Day of the Week Calculator🗂️ 工时计算器（考勤表）Timesheet Calculator🕐 12/24 小时制转换12-Hour ↔ 24-Hour Time Converter🔭 儒略日转换器Julian Date Converter🌅 日出日落时间计算器Sunrise & Sunset Calculator🌙 月相查询Moon Phase Calculator📗 Excel 日期序号转换Excel Date Serial Converter