Filter out specific posts (including EE4 events) from displaying on post archives. https://eventespresso.com/topic/removing-date-and-time-information-from-specific-events/#post-225500

ee_filter_out_specific_events.php

<?php
//* Please do NOT include the opening php tag, except of course if you're starting with a blank file

function ee_filter_pre_get_posts( $query ) {
    if ( ! is_singular() && $query->is_main_query() ) {
        $query->set( 'post__not_in', array( 148, 242 ) );
    }
}
add_action( 'pre_get_posts', 'ee_filter_pre_get_posts' );

instructions.md

Usage notes

You can add the above to a functions plugin or into your WordPress theme's functions.php file.

Change the array( 148, 242 ) to match the post IDs of the events you want to hide.