Here are a few descriptions for the WordPress post tag “後天” in Traditional Chinese, catering to different styles and contexts:

**Option 1: Short and Sweet (General Use)**

> 標籤：後天 (Hòutiān) – 指未來，或出生後、成長以後的日子。

* **Translation:** Tag: 後天 (Hòutiān) – Refers to the future, or the days after birth and growth.
* **Why it works:** Simple, clear, and covers the basic meaning. Good for most uses.

**Option 2: Slightly More Descriptive (Explaining Both Meanings)**

> 標籤：後天 (Hòutiān) – 涵蓋兩個主要含義：一是「來日、未來」，二是與先天的「先天」相對，指出生後、成長過程中形成的，後天的性格、學識或環境。

* **Translation:** Tag: 後天 (Hòutiān) – Encompasses two main meanings: one is “the coming days, the future”, and the other, in opposition to “先天 (xiāntiān – innate)”, refers to the qualities, knowledge, or environment formed after birth and during the process of growth.
* **Why it works:** Provides a more nuanced understanding, mentioning the contrast with “先天” and explaining both meanings. Suitable if the content might discuss either the future or the impacts of upbringing/environment.

**Option 3: Focus on Practical Application (if tag frequently used for planning)**

> 標籤：後天 (Hòutiān) – 當前文章內容與未來、計劃、日程安排相關。也可能涉及到後天影響，例如教育或環境對人生的影響。

* **Translation:** Tag: 後天 (Hòutiān) – This post’s content is related to the future, plans, and schedules. It may also be related to the influence of the post-natal effects, such as education or the environment on life.
* **Why it works:** Very practical. Indicates to readers why this tag is being used on a practical level, making its purpose clear. Use if the content uses the tag to organize the articles.

**Option 4: Literary and Evocative (If the Blog Style is more poetic)**

> 標籤：後天 (Hòutiān) – 歲月長河中，生命之舟的航向。記錄著明日的期許，也承載著後天成長的印記。

* **Translation:** Tag: 後天 (Hòutiān) – The direction of the ship of life in the river of time. Recording the expectations of tomorrow, and also bearing the marks of post-natal growth.
* **Why it works:** More atmospheric and creative. Use this if your blog is known for its deeper thought style.

**How to Use in WordPress:**

1. **Go to the “Tags” section** in your WordPress admin dashboard (usually under “Posts” or “Blog”).
2. **Create a new tag** or edit the existing one.
3. **In the “Description” field,** enter the text of the description that you want to use.
4. **Update/Save** the tag.

Choose the description that best fits the style and content direction of your WordPress site. Good luck!