🍂 按日期查季节Find Season by Date
按气象季节（北半球：春 3-5、夏 6-8、秋 9-11、冬 12-2）判断。本地处理。可设置「半球」。Meteorological season (NH: spring Mar-May, summer Jun-Aug, autumn Sep-Nov, winter Dec-Feb). Processed locally. Settings: Hemisphere.
使用说明与常见问题How-to & FAQ
「按日期查季节」是什么？What is the Find Season by Date tool?
按气象季节（北半球：春 3-5、夏 6-8、秋 9-11、冬 12-2）判断。本地处理。可设置「半球」。Meteorological season (NH: spring Mar-May, summer Jun-Aug, autumn Sep-Nov, winter Dec-Feb). Processed locally. Settings: Hemisphere.
如何使用「按日期查季节」？How do I use the Find Season by Date tool?
输入日期 YYYY-MM-DD 并选择半球，下方即显示对应的气象季节。Enter a date as YYYY-MM-DD and choose a hemisphere to see the meteorological season.
按天文季节还是气象季节？Are these astronomical or meteorological seasons?
这里用气象季节，按整月划分（北半球春季 3–5 月），不是按春分、夏至等二分二至划分。Meteorological seasons, which use whole months (spring is March to May in the Northern Hemisphere), not the equinoxes and solstices.
用的是哪种历法、支持哪些年份？Which calendar and years are supported?
按外推格里高利历（现行公历规则向前沿用）计算，年份为 0001–9999 的整数，输出年份一律 4 位补零（如 0005-12-25）。1e3、0x10 这类写法和多余的内容会报错。The proleptic Gregorian calendar (today's rules applied backwards) for whole-number years 0001 to 9999, always shown with 4 digits such as 0005-12-25. Forms like 1e3 or 0x10 and extra text give an error.
这个工具和时区有关吗？Do time zones affect this tool?
无关。结果只由输入的年份或日期按历法规则算出，不读取设备时钟，也不使用任何时区。No. The result is worked out from the year or date you enter with calendar rules alone; it never reads your device clock or uses a time zone.
有哪些选项可以调整？What options can I adjust?
「按日期查季节」的设置：「半球」可选 北半球、南半球（默认 北半球）。每次生成结果都按当前设置处理。Settings in the Find Season by Date tool — "Hemisphere": Northern, Southern (default Northern). The result always uses the current settings.
「按日期查季节」免费吗？需要注册吗？Is the Find Season by Date tool free? Do I need an account?
「按日期查季节」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 Find Season by Date 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.