Takashi Murakami

If you are not logged in, it will not hide the current public posts. ( Only one generation, but allows the future of the article published. ) 
公開記事を更新（予約投稿）した状態であっても、..訪問者が予約投稿前の記事を閲覧できるようになる

Fixed Future Posts

Plug-in ( Fixed Future Posts ) for the WordPress.

Mark Costlow

Future Dater is a simple plugin to provide a shortcode to include certain types of future (or past) dates in your posts or pages. The type of dates supported are “beginning of next quarter”, “last day of this quarter”, “first day of next month”, etc.
Features
There are 4 arguments to the [futuredate] shortcode:
<ul>
<li>
unit – Required. Which part of the current date you want to modify. Valid values: “month” and “quarter”.
</li>
<li>
relunit – Optional. Whether you want reference the first day or last day of the unit, or the same day as the current date. Valid values: “first”, “last”, or none.
</li>
<li>
count – Required. How much to modify the current date, in units specified by the unit argument. Most commonly 1 (for next month or next quarter) or 0 (for the current month or quarter). Also accepts negative values.
</li>
<li>
format – Optional. PHP date-formatting string to specify how the date should be printed. Most common value: `Y-m-d’.
</li>
</ul>
Examples
<ul>
<li>
The end of this month: [futuredate unit=month relunit=last count=0 format=”Y-m-d H:i:s”]
</li>
<li>
The end of this quarter: [futuredate unit=quarter relunit=last count=0 format=”Y-m-d”]
</li>
<li>
The first day of next quarter: [futuredate unit=quarter relunit=first count=1 format=”Y-m-d”]
</li>
<li>
The end of the quarter, 5 quarters from now: [futuredate unit=quarter relunit=last count=5 format=”Y-m-d”]
</li>
<li>
The end of previous quarter: [futuredate unit=quarter relunit=last count=-1 format=”Y-m-d”]
</li>
<li>
First day of next month: [futuredate unit=month relunit=first count=1 format=”Y-m-d”]
</li>
<li>
Two months from now: [futuredate unit=month count=2 format=”Y-m-d”]
</li>
</ul>

Future Dater

Adds a shortcode to include a specific kind of future date (such as "first day of the next quarter" or "Last day of next month").

Fixed Future Posts vs Future Dater