ICS Calendar includes a number of hooks that were created primarily to allow ICS Calendar Pro to extend its functionality. Many of these hooks are still in development and subject to change, but we will document them here as they become available for theme and add-on developers’ use.
Where do I put this code? We do not recommend making these types of changes unless you have at least a basic understanding of working with PHP. If you are comfortable directly editing files, these changes should generally be made in your theme’s
functions.phpfile. Important: If you are using a third-party theme, you should not edit the files directly, as any automated updates will overwrite your changes. Create a child theme or custom plugin instead.