BASKETBALL/ NBA What day is it? Let’s let Dirk Nowitzki tell us. by Peter Lewis Dallas Mavericks, Dirk Nowitzki, GEICO, HUMP DAY, NBA 0 Comment Aug 28, 2013 Tweet Gotta love Dirk Nowitki — he’s one of those guys not afraid to act silly on camera. Here he spoofs the popular Geico commercial. Enjoy.