Filter from and now date in Contextual Related Posts

crp_change_query_dates.php

<?php

/**
 * Filter crp_posts_from_date.
 *
 * @param string   $where The Minimum date of the WHERE clause of the query.
 * @param int      $id    Post ID
 */
function crp_same_date_from( $where, $id ) {
	global $wpdb, $post;

	$post_time = get_the_time( 'U', $post->ID );
	$from_date = $post_time;
	$from_date = gmdate( 'Y-m-d 0:0:0' , $from_date );

	$where = $wpdb->prepare( " AND $wpdb->posts.post_date >= '%s' ", $from_date );

	return $where;
}
add_filter( 'crp_posts_from_date', 'crp_same_date_from', 10, 2 );


/**
 * Filter crp_posts_from_date.
 *
 * @param string   $where The Minimum date of the WHERE clause of the query.
 * @param int      $id    Post ID
 */
function crp_same_date_now( $where, $id ) {
	global $wpdb, $post;

	$post_time = get_the_time( 'U', $post->ID );

	$to_date = $post_time + DAY_IN_SECONDS;
	$to_date = gmdate( 'Y-m-d 0:0:0' , $to_date );

	$where = $wpdb->prepare( " AND $wpdb->posts.post_date < '%s' ", $to_date );

	return $where;
}
add_filter( 'crp_posts_now_date', 'crp_same_date_now', 10, 2 );