WordPress at a glance
action is not described

post_submitbox_minor_actions action-hook . WP 4.4.0

Fires before the post time/date setting in the Publish meta box.

Usage

add_action( 'post_submitbox_minor_actions', 'action_function_name_6429' );
function action_function_name_6429( $post ){
	// action...
}
$post(WP_Post)
WP_Post object for the current post.

Where the hook is called

post_submit_meta_box()
post_submitbox_minor_actions
wp-admin/includes/meta-boxes.php 76
do_action( 'post_submitbox_minor_actions', $post );

Where the hook is used (in WP core)

Does not used.