🌍 国家之间时间换算Convert Time Between Countries

使用说明与常见问题How-to & FAQ

「国家之间时间换算」是什么？What is the Convert Time Between Countries tool?

在各国家/地区的时区之间换算时间（覆盖全部有时区的国家与地区，多时区国家逐个列出，自动处理夏令时）。本地处理。Convert a wall time between countries and regions (every country with a time zone; multi-zone countries list each zone; DST aware). Processed locally.

如何使用「国家之间时间换算」？How do I use the Convert Time Between Countries tool?

输入 YYYY-MM-DD HH:MM，在“从”和“到”里选择国家或地区（可在筛选框里搜索），下方即显示目标地区的当地时间。Enter YYYY-MM-DD HH:MM, choose the From and To countries or regions (use the filter box to search), and the local time in the To region appears below.

用的是哪个时区？Which time zone is used for each country?

列表包含时区数据库中所有有时区的国家和地区；跨多个时区的国家（如美国、俄罗斯、澳大利亚、巴西）会按城市逐个列出，选项里括号中就是实际使用的 IANA 时区。The list has every country and region in the time zone database. Countries that span several zones (such as the US, Russia, Australia and Brazil) are listed once per zone by city, and the IANA zone in brackets is the one used.

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”里选的地区理解，换算到“到”里选的地区，结果与设备设置无关。No. The time you type is read in the From region and converted to the To region, 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；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, 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。2026-02-29、25:00 这类不存在的值会报错，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。YYYY-MM-DD HH:MM, optionally with :SS, for years 0001 to 9999. Impossible values such as 2026-02-29 or 25:00 give an error instead of rolling over. Years before standard time zones existed use local mean time, so the offset can include seconds.

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

例如把「从」设为 China — Shanghai (Asia/Shanghai)，「到」设为 UTC (Coordinated Universal Time)，输入 2026-01-15 12:00，输出为：2026-01-15 04:00。With "From" set to China — Shanghai (Asia/Shanghai) and "To" set to UTC (Coordinated Universal Time), 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”两个列表包含全部有时区的国家和地区，多时区国家按城市逐个列出（默认中国和美国纽约），列表旁的筛选框可按名称搜索。改动后结果立即更新。The From and To lists contain every country and region with a time zone, with multi-zone countries listed once per city (China and New York, US by default), and the filter box next to each list searches by name. The result updates as soon as you change one.

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

「国家之间时间换算」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 Countries 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.