Take a guided tour to learn the history of Athens neighborhoods like Normaltown (10 a.m.), Cobbham (12:30 p.m.) and Buena Vista (2 p.m.). Registration required. $25 each. www.historicathens.com

Enjoy music and trunk or treat with information about the voting process and how to spot fake news. 11 a.m.–2 p.m. FREE! www.sheatssocialservices.org

This market supports, celebrates and promotes culture and diversity featuring Black and minority entrepreneurs. 12–5 p.m. www.aadmovement.org

The eighth annual festival features live music, food trucks, vendors, kids activities and more in benefit of local nonprofits. 12–11 p.m. $25 (adv.), $30. www.sheilafest.com

The annual fundraiser for UGA Ecology will feature local food, drinks, honey and live music. 3–6 p.m. $60. ecology.uga.edu

Browse different food truck offerings, watch Halloween movies and enter a raffle for prizes. 6 p.m.–12 a.m. www.instagram.com/el_carretonero_athens

This community dance features caller Amanda and Rob Setilli and live music by Rusty Rooster String Band. No partner required. 6:30 p.m. (intro session), 7 p.m. (dance). $12 (adults), $10 (students w/ ID), 17 & under FREE! www.athensfolk.org

Buddha Broccoli Art Gallery presents a party with live performances, vendors and a costume contest. 9 p.m. $10. www.akademiabc.com

This 42nd annual event features a 49 mile route to Dacula and 87 miles route to Atlanta. Registration required. 7 a.m. www.a2a.net

Enjoy vendors, door prizes, yoga, a photo booth, games and a food truck. 9 a.m. (yoga), 10 a.m.–3 p.m. (market). FREE! www.mollyscoffeeco.com

This annual sale will feature tropical houseplants, succulents, and cacti curated from the garden’s greenhouse collection. 10 a.m.​​–3 p.m. FREE! ugatrial.hort.uga.edu

Browse booths by artists, makers and vintage curators during Porchfest. 11 a.m.–5 p.m. www.facebook.com/historicathens