Added Date Filter To Popular Posts Query

Question

For creating a date filter you can use

// Create a new filtering function that will add our where clause to the query
function filter_where( $where="" ) {
    // posts in the last 7 days
    $where .= " AND post_date > '" . date('Y-m-d', strtotime('-7 days')) . "'";
    return $where;
}

add_filter( 'posts_where', 'filter_where' );
$query = new WP_Query( $query_string );
remove_filter( 'posts_where', 'filter_where' );

You can also see here Time Parameter