⏳ 倒计时天数Countdown Days
距目标日的整天数（可负表示已过）；起始日留空则用今天。本地处理。可设置「目标日」、「起始日（空=今天）」。Whole days until a target date (negative if past); blank start uses today. Processed locally. Settings: Target date, From (blank = today).
使用说明与常见问题How-to & FAQ
「倒计时天数」是什么？What is the Countdown Days tool?
距目标日的整天数（可负表示已过）；起始日留空则用今天。本地处理。可设置「目标日」、「起始日（空=今天）」。Whole days until a target date (negative if past); blank start uses today. Processed locally. Settings: Target date, From (blank = today).
如何使用「倒计时天数」？How do I use the Countdown Days tool?
在「倒计时天数」中，填写「目标日」、「起始日（空=今天）」等参数，结果会随输入实时计算并显示在下方。In the Countdown Days: Fill in "Target date", "From (blank = today)"; results are recalculated instantly as you type.
含今天？Inclusive?
结束减起始的整天差。Whole-day end-start difference.
起始日留空？Blank start?
按你设备本地日历的“今天”起算。Uses today on your device local calendar.
能举个计算实例吗？Can you show a worked example?
例如在「倒计时天数」中填 目标日 = 2026-12-31，起始日（空=今天示意用固定日） = 2026-10-20，结果区显示：剩余天数：72For example, entering Target date = 2026-12-31, From (blank = demo fixed day) = 2026-10-20 in the Countdown Days gives: Days left: 72
有哪些选项可以调整？What options can I adjust?
「倒计时天数」的设置：「目标日」默认 2026-12-31；「起始日（空=今天）」可留空。每次生成结果都按当前设置处理。Settings in the Countdown Days — "Target date" default 2026-12-31; "From (blank = today)" optional. The result always uses the current settings.
时区如何处理？How are time zones handled?
「倒计时天数」按日历日期计算，只有“今天”取自你设备的本地日期；计算不涉及钟点，所以时区和夏令时不影响结果。The Countdown Days works with calendar dates; only "today" comes from your device's local date. No clock times are involved, so time zones and daylight saving time do not affect the result.
「倒计时天数」免费吗？需要注册吗？Is the Countdown Days free? Do I need an account?
「倒计时天数」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 Countdown Days is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.