gistfile1.php

<?php

function hpc_spotlight_metaboxes( $meta_boxes ) {
	$prefix = '_hpc_spotlight_'; // Prefix for all fields
	$meta_boxes[] = array(
		'id' => 'hpc_spotlight_meta',
		'title' => 'In The Spotlight settings',
		'pages' => array('spotlight'), // post type
		'context' => 'normal',
		'priority' => 'high',
		'show_names' => true, // Show field names on the left
		'fields' => array(
			array(
				'name'    => 'End date',
				'desc'    => 'Enter the date and time (Pactific Time) when this spotlight feature should cease to appear on the front page.',
				'id'      => $prefix . 'end_time',
				'type'    => 'text_datetime_timestamp',
			),
		),
	);

	return $meta_boxes;
}

add_filter( 'cmb_meta_boxes', 'hpc_spotlight_metaboxes' );