Enjoy a formal Masquerade Ball with music, food, an open bar, photographers, fireworks and more. 9 p.m. $10. Find The Bond House on Facebook

Open bar, food truck, games, photo booth, raffle, live DJ, music performances and more. 11 p.m.–2 a.m. $25. www.eventbrite.com/e/new-years-party-tickets-1059241733539

Give your tree a second life as compost, mulch or fish habitat by bringing your undecorated tree to one of  eight drop-off locations. 9 a.m.–1 p.m. www.accgov.com/chipper

A festival featuring a mix of local and touring bands paired with a variety of local artists as well food vendors and more. 5 p.m.–12 a.m. Email [email protected].

Learn more about OLLI, the learning and social organization for adults over 50, with a drawing for free membership. 1–3 p.m. FREE! olli.uga.edu

Archeologist Tom Gresham and Greg Yoder lead a walk talking about the history of the park and mills. 1 p.m. $5/person, $5 parking pass/vehicle. www.gastateparks.org/WatsonMillBridge

Bring a dish that’s a favorite at your family gatherings and share the story behind it with Genealogical Society members. 2 p.m. FREE! www.athenslibrary.org

Madison Oglethorpe Animal Shelter will have adoptable animals on site, along with live music and a food truck. 2–5 p.m. www.instagram.com/normaltownbrewingco

Drop by to taste Figment’s two non-alcoholic spritz-style sodas. 3–5 p.m. FREE! www.shoptonique.com

Celebrating champions of justice, equality and community impact in Athens and throughout the state of Georgia. 6–9 p.m. $50–100. www.facebook.com/AADMovementjusticecenter

A monthly edu-taiment event with micro talks about anything sexuality related with snacks and drinks. 18 & up. 5:30–7:30 p.m. Donations encouraged. www.revolutiontherapyandyoga.com

Join park rangers on a moderate trail route. 12 p.m. $5 (parking). www.gastateparks.org/WatsonMillBridge

The banquet honors individuals and organizations that have made contributions to human relations and also awards scholarships to high school seniors. 5 p.m. www.humanrelationscouncil.org/mlk-awards-banquet

This community dance features caller Charlotte Crittenden and live music by the Griddle Lickers. 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

This service is a formal observance of the life and goals of the late Rev. Dr. Martin Luther King Jr. 4 p.m. FREE! www.humanrelationscouncil.org

Sample different non-alcoholic wines from St. Vivianna & ISH. 5–7 p.m. FREE! www.shoptonique.com

The marathon, half-marathon and marathon relay will begin at the same time downtown and wrap up with post-race festivities at the Classic Center. 7:30 a.m. www.classiccitymarathon.com

Meet over 20 wedding vendors and enjoy music, door prizes, swag bags and more. 10 a.m.–4 p.m. $10. www.livewireathens.com

This cooking and baking competition requires Terrapin’s Wake-n-Bake Coffee Oatmeal Imperial Stout as an ingredient. 4 p.m. $20. www.terrapinbeer.com

Participants will be given 5–10 minutes to showcase their products and/or services. 10 a.m.–1 p.m. [email protected]

Vintage costume jewelry and a large selection of books will be for sale in benefit of the Friends of the Oglethorpe County Library. 10 a.m.–2 p.m. www.oglethorpefol.org

Browse books and jewelry for sale. 10 a.m.–2 p.m. www.3railroad.org

Browse locally crafted items for gifts plus food, suprises and more. 11 a.m.–4 p.m. www.whitetigerdeluxe.com

Athens Academy hosts its annual costume themed race and sprint to fund a variety of programs at the school. 9 a.m. $30. www.athensacademy.org

Browse locally crafted items from a variety of artists plus food vendors and more. 9 a.m.–1 p.m. www.athensfarmersmarket.net

The Rotary Club of Athens’ fundraiser featuring a chilly plunge into Lake Chapman. 10 a.m. $25. www.plungefestathensgarotary.org