🎂 年龄计算器Age Calculator
根据出生日期精确计算年龄（岁、月、天）、已活天数和距下次生日天数。Calculate exact age in years, months and days, plus days until next birthday.
使用说明与常见问题How-to & FAQ
「年龄计算器」是什么？What is the Age Calculator tool?
根据出生日期精确计算年龄（岁、月、天）、已活天数和距下次生日天数。Calculate exact age in years, months and days, plus days until next birthday.
如何使用「年龄计算器」？How do I use the Age Calculator tool?
在「年龄计算器」中，在上方填写或选择所需内容，结果会实时显示在下方；所有处理都在浏览器本地完成。In the Age Calculator: Fill in or choose the options above and the result appears below instantly; everything runs locally in your browser.
周岁和虚岁有什么区别？Western age vs East Asian age?
本工具计算的是周岁；虚岁通常是周岁加 1 或 2。This tool gives Western (completed-years) age; traditional Chinese 虚岁 is usually 1–2 more.
时区如何处理？How are time zones handled?
「年龄计算器」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 Age Calculator uses your device's local time zone by default, and daylight saving time is handled by the browser.
「年龄计算器」免费吗？需要注册吗？Is the Age Calculator free? Do I need an account?
「年龄计算器」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 Age Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.