By Doug MacCash, NOLA.com | Times-Picayune   dmaccash@nola.com Times-Picayune New Orleans’ smallest Mardi Gras parade. ‘tit Rex, will roll on Feb. 17, 2019, six days earlier than expected. The politically pointed, adult shoe-box parade will also take place on Sunday instead of Saturday as it has in past years. Finally, there will be a time change. ‘Tit Rex’s 2019 parade will start on St. Roch Avenue at 4:30 p.m. instead of 5 p.m. The changes to the popular