That's <a href="http://geocities.yahoo.com/">next Monday</a>. Every GeoCities page will then cease to exist, forever, except perhaps in some half-incarnate zombified form with broken images courtesy of the <a href="http://www.archive.org/index.php">Internet Archive</a>.
So, if you've ever loved someone's <a href="http://www.geocities.com/hugedb/">homely yet charming little corner of the web</a>, please use the next four days or so to come to terms with this parting, save pages for posterity, and make archivalists of yourselves all.