functions.php

gistfile1.txt

add_action( 'init', 'event_rewrites' );
function event_rewrites()
{
    add_rewrite_rule( "/\/events\/day\/([\d]{4}-[\d]{2}-[\d]{2})\/?/", 'index.php?post_type=event&event-date=$matches[1]', 'top' );
}
add_filter( 'query_vars', 'event_vars' );
function event_vars ( $vars )
{
    $vars[] = 'event-date';
    return $vars;
}