- Novelist Allan Topol will sign copies of his book “Washington Power Play: A Political Thriller.” 1 to 4 p.m. Free. International Spy Museum, 800 F St. NW. 202-393-7798.
- The National Building Museum will present “Professor Giuseppe, Master Concatenator!,” an aural journey with cross-cultural percussionist and museum creative-in-residence Steve Bloom exploring how the original master masons instilled the museum building’s geometry with distinctive sound dimensions. 11 a.m. to 2 p.m. Free. National Building Museum, 401 F St. NW. 202-272-2448.
- A park ranger will lead a planetarium program about the season’s brightest stars, planets and constellations (for ages 5 and older). 1 p.m. Free. Rock Creek Nature Center, 5200 Glover Road NW. 202-895-6070. The program will repeat Sunday at 1 p.m.
- The House of Sweden will host a weekly storytime for children and families to experience Swedish children’s literature. 2 p.m. Free. House of Sweden, 2900 K St. NW. www.swedenabroad.com/washington.
- A park ranger will lead a planetarium program about the solar system, the Milky Way and other deep space objects (for ages 7 and older). 4 to 4:45 p.m. Free. Rock Creek Nature Center, 5200 Glover Road NW. 202-895-6070. The program will repeat Sunday at 4 p.m.
Classes and workshops
- The Mount Pleasant Library will present “Saturday Morning Yoga.” 10 a.m. Free. Mount Pleasant Library, 3160 16th St. NW. 202-671-3122.
- The Kennedy Center will host an all-levels vinyasa yoga class led by Chris Duling. 10 a.m. Free; reservations suggested. Grand Foyer, Kennedy Center. kennedy-center.org.
- Heather Markowitz, founder of WithLoveDC, will lead a “Practice With Love” yoga class. 10:30 to 11:30 a.m. Free. National Garden Lawn Terrace, U.S. Botanic Garden, 100 Maryland Ave. SW. 202-225-8333.
- The Mayor’s Office on Asian and Pacific Islander Affairs will host a tai chi class. 10:45 to 11:45 a.m. Free. Chinatown Park, 5th Street and Massachusetts Avenue NW. 202-727-3120.
- Yoga Activist will present a class for beginners. 11 a.m. Free. Petworth Library, 4200 Kansas Ave. NW. 202-243-1188.
- Presented by the D.C. Department of Parks and Recreation and the D.C. Commission on the Arts and Humanities, the third annual Chuck Brown Day will feature performances by the Chuck Brown Band, the We Are One Tribute Band and EU featuring Sugar Bear. The event will also include children’s activities and a back-to-school giveaway, with food trucks on site. 3 to 7 p.m. Free admission. Chuck Brown Memorial Park, 2901 20th St. NE. windmeupchuck.com.
- Jazz pianist and organist Charles Covington will perform with Nasar Abadey on drums and James King on bass. 6 p.m. Free. Millennium Stage, Kennedy Center. 202-467-4600.
- The group Friends of Friendship “Turtle” Park will host its inaugural Jazz Project event to celebrate the reopening of the renovated park, starting with a children’s concert by Dinorock, at 6 p.m.; and continuing with a performance by self-taught piano prodigy Bob Diener, bassist Paul Langosch and guitarist Rick Whitehead, from 7 to 9 p.m. Attendees are encouraged to bring a blanket and a picnic; food trucks will also have items available for purchase. Free admission. Friendship-Turtle Park Recreation Center, 45th and Van Ness streets NW.
- The Adinkra Group will present the Birthright Annual Concert, featuring Egun Omode, Taratibu Youth Association, ASA! Kelenya and Farafina Kan Family. 7 p.m. $20 to $60. Town Hall Education Arts Recreation Campus (THEARC), 1901 Mississippi Ave. SE. BirthrightMovement.com.
- “Ladies of Jazz” will feature Julia Nixon. 7:30 and 9:15 p.m. $12.50 to $19.50; tickets required. Mr. Henry’s Restaurant, 601 Pennsylvania Ave. SE. 202-546-8412.
- “Sounds of the Underground” will feature vocalist Rue Brown performing a mix of blues, jazz, reggae and hip-hop. 9 p.m. $18 to $20. Dupont Underground, 1500 19th St. NW. dupontunderground.org.
Discussions and lectures
- Jannes Waples Gibson, board member of Andean Textile Arts and former education program specialist at the Textile Museum, will discuss “Empowering Weavers at the Center for Traditional Textiles of Cusco.” 10:30 a.m. Free. George Washington University Museum and Textile Museum, 701 21st St. NW. 202-994-5200.
- Herbalist, organic farmer, author and international speaker Tammi Hartung will discuss “Cattail Moonshine and Milkweed Medicine,” about various North American plants. 10:30 a.m. to noon. Free; reservations required. Conservatory Classroom, U.S. Botanic Garden, 100 Maryland Ave. SW. 202-225-8333.
- U.S. Botanic Garden science education volunteer Todd Brethauer will discuss “The Botany and Chemistry of Brewing — Wheat.” 1 to 2:30 p.m. Free; reservations required. Conservatory Classroom, U.S. Botanic Garden, 100 Maryland Ave. SW. 202-225-8333.
- Realtor Ebony Bates will host a real estate Q&A featuring insider tips. 2:30 p.m. Free. Tenley-Friendship Library, 4450 Wisconsin Ave. NW. 202-727-1488.
- Hosted by the University of the District of Columbia, Van Ness Main Street, Comcast and RCN, the Van Ness Neighborhood Social will feature music, games, a petting zoo, children’s activities and complimentary food. 11 a.m. to 3 p.m. Free admission. Student Center, University of the District of Columbia, 4200 Connecticut Ave. NW.
- The inaugural Capital Chili Cook-Off and DMV Beer Festival at the Bullpen will feature samples of local brews from D.C., Maryland and Virginia, as well as food from 30 chili cooks competing for prizes and entry into the 2017 World Championship Chili Cook-off. 2 to 6 p.m. $45 to $65. Half Street Fairgrounds, 1199 Half St. SE. capitalchilicookoff.com.
- “Gaumont at 120: Twelve Unseen Treasures” will feature Raymond Bernard’s 1924 movie “Le miracle des loups,” with live accompaniment by pianist Andrew Simpson. 2 p.m. Free. East Building Auditorium, National Gallery of Art, 4th Street and Pennsylvania Avenue NW. 202-737-4215.
- The Washington Jewish Film Festival will present “American Socialist: The Life and Times of Eugene Victor Debs,” about the history of American populism and a man who inspired progressive ideas from Franklin Roosevelt’s New Deal to Bernie Sanders’ 2016 presidential campaign. A discussion with filmmaker Yale Strom and writer Elizabeth Schwartz will follow. 7 to 9 p.m. $13. Edlavitch DC Jewish Community Center, 1529 16th St. NW. wjff.org.
- The D.C. Department of Parks and Recreation will present the Mayor’s Cup 2017, an amateur boxing tournament featuring women and men ages 8 through 40. 2 to 6 p.m. Free; reservations required. Raymond Recreation Center, 3725 10th St. NW. bit.ly/DPRMayorsCup2017. The tournament will continue Sunday from 2 to 6 p.m.
- Joseph LMS Green will host a youth open mic poetry event with teen members of the DC Youth Slam Team. 5 to 7 p.m. $5. Cullen Room, Busboys and Poets 5th & K, 1025 5th St. NW. 202-789-2227.
Tours and walks
- A park ranger will lead “Seasonal Discovery Nature Walk: MIlkhouse Ford Loop.” 11 a.m. to 1 p.m. Free. Meet at the Rock Creek Nature Center, 5200 Glover Road NW. 202-895-6000.
- Washington Walks’ “Get Local!” series will feature “Georgetown Waterfront.” 11 a.m. $15 to $20. Meet in the park at 28th Street and Pennsylvania Avenue NW. washingtonwalks.com.
- “Close-up Tour: Earthquake” will examine the damage incurred by the magnitude 5.8 earthquake that rocked the Washington National Cathedral on Aug. 23, 2011 (for ages 10 and older). 2 p.m. $18 to $22; reservations suggested. Meet at the west-end docent station, Washington National Cathedral, Massachusetts and Wisconsin avenues NW. cathedral.org.
- “Visit Dupont Underground” will offer a chance to explore the city’s newest art space — a former trolley station with 75,000 square feet of underground platforms and tunnels. Hourly from noon to 5 p.m. $16. Dupont Underground, 1500 19th St. NW. dupontunderground.org. The tour will also be offered Sunday at the same times.