🌐 时区之间时间换算Convert Time Between Timezones

使用说明与常见问题How-to & FAQ

「时区之间时间换算」是什么？What is the Convert Time Between Timezones tool?

在全部 IANA 时区之间换算墙钟时间（可搜索，自动处理夏令时）。本地处理。可设置「从」、「到」。Convert wall-clock time between all IANA time zones (searchable list, DST aware). Processed locally. Settings: From, To.

如何使用「时区之间时间换算」？How do I use the Convert Time Between Timezones tool?

输入 YYYY-MM-DD HH:MM，在“从”和“到”里选择时区（可在筛选框里输入城市名），下方即显示目标时区的时间。Enter YYYY-MM-DD HH:MM, choose the From and To time zones (type a city into the filter box to find one), and the time in the To zone appears below.

有哪些时区可选？Which time zones can I pick?

列表包含浏览器支持的全部 IANA 时区（Intl.supportedValuesOf），旧浏览器则使用内置的完整时区表；在下拉框旁的筛选框里输入城市名（如 kolkata、new york）即可快速查找。Every IANA time zone the browser supports (Intl.supportedValuesOf); older browsers fall back to a built-in full list. Type a city such as kolkata or new york into the filter box next to the list to find it quickly.

会用到我设备的时区吗？Does it use my device's time zone?

不会。输入的时间按“从”里选的时区理解，换算到“到”里选的时区，结果与设备设置无关。No. The time you type is read in the From zone and converted to the To zone, so your device settings do not affect the result.

夏令时切换时怎么处理？How are daylight saving time changes handled?

夏令时规则由浏览器的时区数据决定。时钟向前拨时不存在的时间（如纽约 2026-03-08 02:30）会向后顺延到 03:30（即 07:30 UTC）；时钟往回拨时出现两次的时间取较早的一次，两种情况都会在结果下方提示。The browser's time zone data supplies the rules. A time skipped when clocks go forward (such as 2026-03-08 02:30 in New York) moves forward to 03:30, which is 07:30 UTC, and a time that occurs twice when clocks go back uses the earlier occurrence. Both cases show a note below the result.

可以输入哪些日期？Which dates can I enter?

YYYY-MM-DD HH:MM（可带 :SS），年份 0001–9999。不存在的日期或时间会报错，不会自动顺延。早于标准时区出现的年份使用当地平太阳时（LMT），偏移会带秒；这时即使输入不带秒，结果也会显示秒（例如 UTC 0001-01-01 00:00 → 纽约 0000-12-31 19:03:58）。YYYY-MM-DD HH:MM, optionally with :SS, for years 0001 to 9999. Impossible dates or times give an error instead of rolling over. Years before standard time zones existed use local mean time, so the offset can include seconds; the result then shows seconds even if you typed none (for example UTC 0001-01-01 00:00 → New York 0000-12-31 19:03:58).

输入和输出是什么样的？What does the input and output look like?

例如把「从」设为 Asia/Shanghai，「到」设为 UTC，输入 2026-01-15 12:00，输出为：2026-01-15 04:00。With "From" set to Asia/Shanghai and "To" set to UTC, the input 2026-01-15 12:00 becomes 2026-01-15 04:00.

有哪些选项可以调整？What options can I adjust?

“从”和“到”两个列表包含全部 IANA 时区（默认 Asia/Shanghai 和 America/New_York），列表旁的筛选框可按城市名搜索。改动后结果立即更新。The From and To lists contain every IANA time zone (Asia/Shanghai and America/New_York by default), and the filter box next to each list searches by city name. The result updates as soon as you change one.

「时区之间时间换算」免费吗？需要注册吗？Is the Convert Time Between Timezones tool free? Do I need an account?

「时区之间时间换算」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 Convert Time Between Timezones tool is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.