The neighborhood of Columbia Heights has changed a lot in the time this festival started two years ago. This year’s event will feature yoga, live music – from reggae to rock to hip-hop – a petting zoo, food samples and performances, plus a Sticky Fingers Cupcake Eating Contest and a dog show. And area businesses and restaurants will offer their wares for sales and specials. It should be quite the to-do – with or without your usual stop at Target. Saturday, Aug. 29, starting at 10 a.m. Harriet Tubman Elementary, 13th and Kenyon St. NW. Free. Visit www.columbiaheightsday.org.