Hi, welcome on this forum where users try to help other users. Please give enough infos about your system (Joomla and JEM) to make it possible to help you.
If you mean with "calendar view" the simple list, then in the settings of this menu you can include or exclude categories.
If you mean calendar view, then in the settings of this menu you can indicate the top category.
PHP 7.2.9 on different sites
JEM 2.3.0dev 2.0M and specials with Joomla! 3.9.3 stable on livesites
ja_simply, ja_purity_iii, multilingual DE EN IT FR