Here are a few options for the description of the WordPress post_tag “可到職日期” in Traditional Chinese, along with explanations to help you choose the best fit:

**Option 1 (Most Literal and General):**

* **Description:** 文章標籤，用於標示職位空缺或相關資訊的期望到職日期。 (Wénzhāng biāoqiān, yòngyú biāozhì zhíwèi kōngquē huò xiāngguān zīxùn de qīwàng dào zhí rìqí.)
* **Translation:** Article tag used to indicate the expected start date for job vacancies or related information.
* **Explanation:** This is a straightforward and accurate description. It is useful in various scenarios related to job postings and hiring.

**Option 2 (More Concise):**

* **Description:** 標示工作機會的到職日期。 (Biāozhì gōngzuò jīhuì de dào zhí rìqí.)
* **Translation:** Indicates the start date for job opportunities.
* **Explanation:** Simple and to the point. Good for quick understanding.

**Option 3 (Emphasis on Flexibility – if applicable, it depends on the use case):**

* **Description:** 用於標記可供參考的到職日期範圍或期望日期。 (Yòngyú biāojì kě gōng cānkǎo de dào zhí rìqí fànwéi huò qīwàng rìqí.)
* **Translation:** Used to mark the range or expected date of start date for reference.
* **Explanation:** If the dates are not absolutely fixed, and there’s consideration for flexibility this option is useful. Offers more nuance.

**Option 4 (Emphasis on Specific Applications, if applicable):**

* **Description:** 用於徵才內容，指出職位空缺的期望到職日期。 (Yòngyú zhēngcái nèiróng, zhǐchū zhíwèi kōngquē de qīwàng dào zhí rìqí.)
* **Translation:** Used in recruitment content, indicating the expected start date for job vacancies.
* **Explanation:** If this tag is *specifically* for job postings on your site, and you want to clarify that, this is suitable.

**How to Choose:**

* **Consider your use case:** How will you use this tag on your WordPress site? Are you posting job opportunities, other types of information?
* **Clarity and conciseness:** Choose the description that best and most simply conveys the purpose.
* **Target audience:** What level of understanding do your users have with WordPress and tagging?

For most general cases, **Option 1** and **Option 2** are the most practical. They provide a clear explanation that is both informative and accessible. If the content is only for job posting then go with **Option 4**. Choose the one which describes your purpose the best.