Horje
Because the builtin calendar doesn't have such an option.

Noted That:

  • To install correctly this post-types-calendar.zip.
  • Fisrt Download the post-types-calendar.zip to your computer
  • Extract/Open post-types-calendar.zip to Your Computer.
  • Then, Find readme.txt file inside post-types-calendar.zip and Open readme.txt.
  • Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
  • Then, Follow the Tips Below.

Start the Tips:

1. First Download "post-types-calendar.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

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3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

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4. Now, Click on "Upload Plugin" button.

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5. Now, Browse "post-types-calendar.zip" Downloaded plugin from your computer, Where you downloaded post-types-calendar.zip According to Step – 1 Above then, click on "Install Now"

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6. Now, Click on "Active Plugin"

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7. Then, See left sidemenu. "WordPress Calendar For Custom Post Types" folder is added on left sidemenu. Now, Click on "WordPress Calendar For Custom Post Types" folder.

   Noted that: If you do not see "WordPress Calendar For Custom Post Types" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about WordPress Calendar For Custom Post Types Configurtions and Settings or How to work "WordPress Calendar For Custom Post Types" in your WordPress site.

 

oR

After Activated Plugin According to Step-6 then,

  1. Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
  2. or Direct go to: https://yourdomain/wp-admin/plugins.php
  3. Then, Find "WordPress Calendar For Custom Post Types" Activated Plugin from Plugin List.
  4. Then, Click on "Settings" from Plugin that is WordPress Calendar For Custom Post Types
  5. Now, Edit/Add/Config the setting and Click on "Save Changes" button,
WP Plugin Setting


Guide

Please follow the standard installation procedure for WordPress plugins.

Reffered: https://wordpress.org/