Carnaval Parade: Starts at 24th St. and Bryant, SF. Sun/26, 9:30am, free; Festival: Harrison between 16th and 24th Sts., SF. Sat/25-Sun/26, 10am-6pm, free. www.carnavalsf.com. The Mission's most colorful processional and music fest had to change hands this year to avoid financial ruin. Show your delight at its survival by showing up in force for the samba, sequins, and spectacle.