Snippets: Hide Blog Date & Add Page Setting to Conditionally Enable It

// Add new page setting
add_filter( 'wpex_metabox_array', function( $options, $post ) {

	// Add new setting to main tab for blog posts only
	if ( 'post' != get_post_type( $post ) ) {
		return $options;
	}

	// Add new setting
	$options['main']['settings']['wpex_display_date'] = array(
		'title'       => __( 'Show Date?', 'wpex' ),
		'description' => __( 'Display date on entries and posts', 'wpex' ),
		'id'          => 'wpex_display_date',
		'type'        => 'select',
		'options'     => array(
			'' => __( 'No', 'wpex' ), // Default is no so it has an empty value
			'yes'   => __( 'Yes', 'wpex' ),
		),
	);

	// Return all options
	return $options;

}, 2, 20 );

// Show hide date
function wpex_blog_meta_sections( $sections ) {

	// Check meta option to display date if not remove
	if ( 'yes' != get_post_meta( get_the_ID(), 'wpex_display_date', true ) ) {
		unset( $sections['date'] );
	}

	// Return sections
	return $sections;

}
add_filter( 'wpex_blog_entry_meta_sections', 'wpex_blog_meta_sections' );
add_filter( 'wpex_blog_single_meta_sections', 'wpex_blog_meta_sections' );

Result:

All PHP snippets should be added via a child theme's functions.php file.