📅 今天的日期（实时时钟、第几天、ISO 周）Today's Date (live clock, day of year, ISO week)
实时显示今天的日期和时间（本地时区）：多种日期格式、星期、今年第几天、ISO 周数、今年还剩几天和 Unix 时间戳。本地处理。Today's date and a live clock in your local time zone: several date formats, weekday, day of the year, ISO week number, days left in the year and the Unix timestamp. Processed locally.
使用说明与常见问题How-to & FAQ
「今天的日期（实时时钟、第几天、ISO 周）」是什么？What is the Today's Date (live clock, day of year, ISO week) tool?
实时显示今天的日期和时间（本地时区）：多种日期格式、星期、今年第几天、ISO 周数、今年还剩几天和 Unix 时间戳。本地处理。Today's date and a live clock in your local time zone: several date formats, weekday, day of the year, ISO week number, days left in the year and the Unix timestamp. Processed locally.
如何使用「今天的日期（实时时钟、第几天、ISO 周）」？How do I use the Today's Date (live clock, day of year, ISO week) tool?
在「今天的日期（实时时钟、第几天、ISO 周）」中，点击「复制日期」按钮即可。In the Today's Date (live clock, day of year, ISO week): Click "Copy date".
用的是哪个时区？Which time zone is used?
你的浏览器 / 设备的本地时区，页面会显示时区名称和与 UTC 的偏移。Your browser / device local time zone; the page shows its name and offset from UTC.
ISO 周怎么算？How is the ISO week counted?
按 ISO 8601：每周从周一开始，包含该年第一个周四的那一周是第 1 周，所以 1 月初的几天可能属于上一年的第 52 / 53 周（如 2021-01-03 是 2020-W53-7）。Per ISO 8601: weeks start on Monday and week 1 is the week containing the year's first Thursday, so the first days of January can belong to week 52 / 53 of the previous year (e.g. 2021-01-03 is 2020-W53-7).
Unix 时间戳是什么？What is the Unix timestamp?
从 1970-01-01 00:00:00 UTC 起经过的秒数（或毫秒数），与时区无关。The number of seconds (or milliseconds) since 1970-01-01 00:00:00 UTC; it does not depend on the time zone.
「今天的日期（实时时钟、第几天、ISO 周）」免费吗？需要注册吗？Is the Today's Date (live clock, day of year, ISO week) free? Do I need an account?
「今天的日期（实时时钟、第几天、ISO 周）」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 Today's Date (live clock, day of year, ISO week) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.