Qaisar Feroz

If you want to change the content on your page depending on the date/time, you can use the short codes created by this plugin on your page to schedule in advance what content (from other existing pages) to display. The URL stays the same, but displays other pages content.
So say you are changing your sales page depending on the date/time to remove/add bonus offers or change price, you can create each sales offer on its own page, and then schedule which offer/page to display using the short codes provided.
You reference the page via its slug so you could have your page “mydomain.com/sales” show the content of /sales1 starting tomorrow, which could be replaced by /sales2 on X date/time which could then be later replaced by /sales3 on Y date/time indefinitely – but all the while the URL shows “mydomain.com/sales.
Note, if you view page source, you will find the url of the page of the content you are showing.
There is also a setting for a default page just in case you mess up the date/time settings.
It works off the time you have in your WP General Settings.
Confirmed to work with OptimizePress 2.0 also btw. 
This was created for a client to show a different interview with its own audio & graphics every two days – so that whenever the link was clicked on it would show the current interview.
<h4>Shorcodes</h4>
The plugin provide two shorcodes to schedule content.
1. show_now
This shorcode add a page/post to the schedule.
It accepts three parameters:
start : Start date and time
stop : Stop date and time
path : path of the page/post to show during above times. See FAQ section for detail of this parameter.
2. show_now_default
This shortcode sets a default page/post that is served when there is no page/post schedule at the time of visit.
It is important that you put this shortcode at the end of schedule. See example below.
<h4>Example:</h4>
To schedule two pages the-morning-star and the-night-star use following shortcode in a page/post:
[show_now start=“5/14/14 04.00” stop=“5/14/14 15.00” path = the-morning-star]
[show_now start=“5/14/14 16.00” stop=“5/15/14 04.00” path = the-night-star]
[show_now_default path = the-evening-star]
The page with path the-evening-star will be served to visitor in case there is no page/post scheduled at the time of visit.

Schedule Content

Display the content of specific page/post on specific date and time using shortcode

Hideki Tanaka

Biz Calendarは、営業日・イベントカレンダーをウィジェットに表示するプラグインです。 
休業日、イベント開催日を表示するカレンダーを サイドメニューに簡単に作成できます。
<h4>特徴</h4>
<ul>
<li>曜日を指定して定休日に設定できます</li>
<li>臨時休業日・臨時営業日を登録できます</li>
<li>イベント開催日、urlを設定できます</li>
<li>ページを移動せずに翌月・前月のカレンダーを表示できます</li>
</ul>
詳細な使用方法はこちらです: http://residentbird.main.jp/bizplugin/plugins/bizcalendar/

Biz Calendar

Business day and event calendar on widget.

Schedule Content vs Biz Calendar