> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/zh-tw/wen-yu-da/32-how-do-i-make-today-display-the-date-according-to-my-time-zone.md).

# 我該如何讓 \today 根據我的時區顯示日期？

如果您需要顯示依您時區的當地日期／時間，您可以變更 `TZ` （時區）環境變數，使用自訂的 `latexmkrc` 檔案：

1. 在您的專案編輯器視窗中，點擊檔案樹狀面板頂端的「上傳」按鈕。
2. 選擇「新增檔案」，並將檔案命名為 `latexmkrc` （不含副檔名）。
3. 將以下這一行加入檔案中 `latexmkrc`:

   ```perl
   $ENV{'TZ'}='Asia/Kuala_Lumpur';
   ```

   或者您需要的任何其他時區。以下是 [供參考的支援時區清單](http://php.net/manual/en/timezones.php).

日期與時間（例如 `\today` 以及 `\DTMcurrenttime` 來自 `datetime2` 套件）在 PDF 中應會顯示指定時區的當地值。

![使用 latexmkrc 變更您專案的時區](/files/89154c8ed894ebb1e624ccff57eb4634f4ff0b1f)

下列範例可透過下方連結在 Overleaf 中開啟。該 `latexmkrc` 檔案—顯示於 LaTeX 程式碼下方—會自動建立。

**`main.tex`**

```latex
\documentclass{article}
\usepackage{datetime2}

\title{變更時區範例}
\author{Overleaf}
\date{\today}

\begin{document}

\maketitle

紐約現在的時間是 \DTMcurrenttime。

\end{document}
```

**`latexmkrc`**

```latex
$ENV{'TZ'}='America/New_York';
```

[在 Overleaf 中開啟這個雙檔案範例](https://www.overleaf.com/docs?engine=pdflatex\&snip_name\[]=main.tex\&snip\[]=%5Cdocumentclass%7Barticle%7D%0A%5Cusepackage%7Bdatetime2%7D%0A%0A%5Ctitle%7BChanging+Timezones+Example%7D%0A%5Cauthor%7BOverleaf%7D%0A%5Cdate%7B%5Ctoday%7D%0A%0A%5Cbegin%7Bdocument%7D%0A%0A%5Cmaketitle%0A%0AThe+time+right+now+in+New+York+is+%5CDTMcurrenttime.%0A%0A%5Cend%7Bdocument%7D\&snip_name\[]=latexmkrc\&snip\[]=%24ENV%7B%27TZ%27%7D%3D%27America%2FNew_York%27%3B\&main_document=main.tex)


---

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