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🗓️ 随机月份生成器Random Month Generator
从一年 12 个月中随机抽取一个或多个月份，可限定起止月份（支持跨年，如 11 月到次年 2 月），可选择不重复；每个结果显示月份序号、天数、季度和南/北半球的季节。适合抽签排期、课堂游戏、随机活动主题和测试数据。Pick one or more random months, optionally limited to a range (which can wrap round the year, e.g. November to February), with or without repeats. Each result shows the month number, days, quarter and the season in the northern or southern hemisphere. Handy for scheduling draws, classroom games, themed events and test data.
使用说明与常见问题How-to & FAQ
「随机月份生成器」是什么？What is the Random Month Generator tool?
从一年 12 个月中随机抽取一个或多个月份，可限定起止月份（支持跨年，如 11 月到次年 2 月），可选择不重复；每个结果显示月份序号、天数、季度和南/北半球的季节。适合抽签排期、课堂游戏、随机活动主题和测试数据。Pick one or more random months, optionally limited to a range (which can wrap round the year, e.g. November to February), with or without repeats. Each result shows the month number, days, quarter and the season in the northern or southern hemisphere. Handy for scheduling draws, classroom games, themed events and test data.
如何使用「随机月份生成器」？How do I use the Random Month Generator tool?
在「随机月份生成器」中，按需设置「数量」、「从」、「到」、「半球」、「排序」等选项，然后点击「随机抽取」、「复制」按钮即可。In the Random Month Generator: Set "Count", "From", "To", "Hemisphere", "Order", then click "Pick", "Copy".
季节是怎么划分的？How are seasons assigned?
使用气象季节：北半球 3–5 月为春季、6–8 月为夏季、9–11 月为秋季、12–2 月为冬季；南半球正好相反（如 1 月是夏季）。天文季节以春分、夏至等日期为界，会相差约三周。Meteorological seasons: in the northern hemisphere March–May is spring, June–August summer, September–November autumn and December–February winter; the southern hemisphere is the reverse (January is summer). Astronomical seasons, which start at the equinoxes and solstices, run about three weeks later.
起止月份可以跨年吗？Can the range wrap round the year?
可以。例如“从 11 月到 2 月”包含 11、12、1、2 四个月；起止相同则只抽这一个月。Yes. From November to February covers November, December, January and February; if From and To are the same month, only that month is drawn.
不重复和可重复有什么区别？What does No repeats change?
勾选“不重复”时，每个月最多出现一次，所以数量不能超过范围内的月份数；取消勾选后每次都从整个范围独立抽取，最多可抽 100 次，适合做概率实验。With No repeats ticked each month appears at most once, so the count cannot exceed the months in the range. Untick it to draw independently each time (up to 100 picks), which suits probability experiments.
结果是随机的吗？Are the picks random?
使用 crypto.getRandomValues 等概率抽取，“按月份顺序”只改变显示顺序，不影响抽取结果。Yes, every month in the range is equally likely using crypto.getRandomValues. Calendar order only changes how the results are listed.
随机结果真的随机吗？Is the randomness truly random?
「随机月份生成器」使用浏览器的 crypto.getRandomValues（密码学安全随机数）生成结果，并做了无偏处理，每个结果出现的概率相同。The Random Month Generator uses crypto.getRandomValues (cryptographically secure randomness) with unbiased sampling, so every outcome is equally likely.
「随机月份生成器」免费吗？需要注册吗？Is the Random Month Generator free? Do I need an account?
「随机月份生成器」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 Random Month Generator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.