> For the complete documentation index, see [llms.txt](https://tofucat-docs.bruh0422.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tofucat-docs.bruh0422.xyz/useful/date.md).

# 日期天數差計算

用法 `=date <年/月/日> <年/月/日>`