Hi,
You need to customize the web part - best way to create a clone and modify this clone to avoid issues when upgrading or hotfixing. In the code behind of the web part (\CMS\CMSWebParts\EventManager\EventManager.ascx.cs) there is a check for the page type made:
if (StopProcessing || DocumentContext.CurrentDocument == null || DocumentContext.CurrentDocument.NodeClassName.ToLowerCSafe() != "cms.bookingevent")
{
So, you need to modify this condition.
Best regards,
Juraj Ondrus