- 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.
- “Reptiles Alive!” will offer a chance to meet live animals and learn funny stories and facts about them. 3:30 p.m. Free. Juanita E. Thornton/Shepherd Park Library, 7420 Georgia Ave. NW. 202-541-6100.
- 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.
- Photography teacher Amanda Archibald will present a class on how to take portraits with your camera or cellphone. 10 a.m. to noon. Free; reservations suggested. Petworth Library, 4200 Kansas Ave. NW. dclibrary.org/node/56789.
- 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.
- University Legal Services will present a First-Time Homebuyer’s Credit Seminar (in English and Spanish). Noon. Free. Mount Pleasant Library, 3160 16th St. NW. 202-671-3122.
- Lauren Kingsland will present “Quilting for Beginners,” a two-session weekend course about the basics of hand-stitched quilt-making. Noon to 4 p.m. $85 to $105. S. Dillon Ripley Center, 1100 Jefferson Drive SW. 202-633-3030. The workshop will continue Aug. 19.
- Michelle Mirpour, professional organizer and lifestyle coach, will lead a workshop on clearing out the clutter and getting organized. 2 p.m. Free. Chevy Chase Library, 5625 Connecticut Ave. NW. 202-282-0021.
- Professor David Hoof will present a drop-in creative writing course on “Creating Irresistible Stories.” 2 p.m. Free; reservations requested. Georgetown Library, 3260 R St. NW. firstname.lastname@example.org.
- Labyrinth Games & Puzzles will present a workshop on how to play cooperative board games such as Pandemic, Forbidden Island and Race to Treasure. 2 to 3:30 p.m. Free. West End Interim Library, 2522 Virginia Ave. NW. 202-724-8707.
- The eccentric six-member Korean band SsingSsing will perform a mix of glam-rock and deep-rooted Korean folk. 6 p.m. Free. Millennium Stage, Kennedy Center. 202-467-4600.
- “Ladies of Jazz” will feature Akua Allrich. 8 to 11 p.m. No cover; $15 minimum. Mr. Henry’s Restaurant, 601 Pennsylvania Ave. SE. 202-546-8412.
Family programs and festivals
- The Mount Vernon Triangle Community Improvement District will host a petting zoo with rabbits, chicks, ducks, sheep, goats and more. 10 a.m. to noon. Free. Milian Park, 5th Street and Massachusetts Avenue NW. mvtcid.org.
- The DAR World’s Fair will feature craft activities for all ages, live musical performances, “national pavilions” organized by international cultural centers and embassies, a museum scavenger hunt, 19th-century games and samples of foods that debuted at World’s Fairs. 10 a.m. to 3 p.m. Free admission. DAR Museum, 17th and C streets NW. dar.org/WorldsFair.
- Miller Jeanne Minor and the Friends of Peirce Mill will host “Run of the Mill,” a chance to see Washington’s only surviving gristmill in action. 11 a.m. to 2 p.m. Free. Peirce Mill, Tilden Street and Beach Drive NW. 202-895-6070. The program will also be offered Aug. 26.
- The Greater Washington Urban League will host a Back to School Festival, featuring health screenings for the whole family, healthy cooking demonstrations, backpack giveaways, live entertainment, food and more. 11 a.m. to 3 p.m. Free. Greater Washington Urban League, 2901 14th St. NW. 202-265-8200.
- A Back to School Community Festival will feature music, food, pony rides, health screenings and free backpacks for returning students ages 5 to 13. 11 a.m. to 4 p.m. Free. Peoples Congregational United Church of Christ, 4704 13th St. NW. peopleschurchucc.org.
- “Cinéma de la révolution: America Films Eighteenth-Century France” will feature William Dieterle’s 1934 movie “Madame Du Barry,” starring Dolores del Rio as the erstwhile courtesan and Louis XV consort. 12:30 p.m. Free. East Building Auditorium, National Gallery of Art, 4th Street and Pennsylvania Avenue NW. 202-737-4215.
- The Washington Jewish Film Festival’s series “For Your Consideration,” a sampling of recent Oscar submissions in the Best Foreign Language Film category, will feature Australia’s “Tanna,” about young lovers caught between the traditions and taboos of their tribe and following the desires of their hearts, at 1:30 p.m.; Italy’s “Fire at Sea,” a documentary about the tiny Sicilian island of Lampedusa, a key entry point for refugees fleeing war and persecution in Africa, at 6 p.m.; Yemen’s “I Am Nojoom, Age 10 and Divorced,” a true story of underage marriage that reflects the painful reality of Yemeni tribal culture and the vulnerability of girls, at 7:45 p.m.; and Poland’s “Afterimage,” about the life of the passionate artist Wladyslaw Strzeminski, at 8:30 p.m. $13.50 per screening. Edlavitch DC Jewish Community Center, 1529 16th St. NW. wjff.org. The series will continue Sunday.
- The Library of Congress will present the 2014 film “Testament of Youth,” about a young woman who leaves Oxford University to become a war nurse. 2:30 to 4:30 p.m. Free. Pickford Theater, Madison Building, Library of Congress, 101 Independence Ave. SE. 202-707-0245.
- “Gaumont at 120: Twelve Unseen Treasures” will feature Jacques Becker and Max Ophüls’ 1958 movie “Les amants de Montparnasse.” 3 p.m. Free. East Building Auditorium, National Gallery of Art, 4th Street and Pennsylvania Avenue NW. 202-737-4215.
- Words Beats and Life will present “Footsteps in the Dark: Journey of Hip-Hop Movement,” an original dance production showcasing the work of American and international dancers of Muslim backgrounds. 2 and 7 p.m. $10 to $12. Sprenger Theatre, Atlas Performing Arts Center, 1333 H St. NE. 202-399-7993.
- Comedian Joe Mande will perform. 8 p.m. $15 to $18. Sixth & I Historic Synagogue, 600 I St. NW. 877-987-6487.
- The Silver and Linen Guild, whose members help keep the Washington National Cathedral’s altars and worship pieces bright and beautiful, will hold a training and work day for prospective volunteers to learn about the group’s behind-the-scenes work. 9 a.m. to 1 p.m. Free; reservations required. Washington National Cathedral, Massachusetts and Wisconsin avenues NW. email@example.com.
- An Officer and Gentlewoman will host the sixth annual “Toast With the Queens,” celebrating the accomplishments of three reigning beauty queens in the Mrs. America pageant system — Mrs. DC America, Julie Cangialosi; Mrs. Pennsylvania America, Valerie Ross; and Mrs. Delaware America, Ivana Hamilton. 2 to 4 p.m. $25 to $100; reservations required. Morrison-Clark Inn and Restaurant, 1011 L St. NW. tinyurl.com/y8ctagf5.
- The National Capital Astronomers will present “Exploring the Sky,” featuring a night of stargazing through the lens of a telescope. 8:30 p.m. Free. Military Field near the Picnic Grove 13 parking lot, Glover Road near Military Road NW. 202-895-6070.
- D.C. United will play Real Salt Lake. 7 p.m. $20 to $200. RFK Stadium, 2400 East Capitol St. SE. 800-745-3000.
- The Washington Nationals will play the San Francisco Giants. 7:05 p.m. $12 to $370. Nationals Park, 1500 South Capitol St. SE. 888-632-6287. The series will continue Sunday at 1:35 p.m.
- The Washington Mystics will play the Indiana Fever. 7:30 p.m. $19 to $99. Capital One Arena, 601 F St. NW. 800-745-3000.
- The University of the District of Columbia will host a tour of a green roof on campus used by students as a living laboratory for rooftop urban farming and green infrastructure. 10:30 to 11:30 a.m. Free; reservations required. Building 44, University of the District of Columbia, 4200 Connecticut Ave. NW. tinyurl.com/y7mvfxnt. The tour will also be offered on Sept. 23.
- Washington Walks’ “Get Local!” series will feature “Renewing Urban Renewal,” about development in Southwest since the 1960s. 11 a.m. $15 to $20. Meet outside the Waterfront Metrorail station. washingtonwalks.com.
- “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.
- A slide show and outdoor tour will focus on the Washington National Cathedral’s whimsical stone gargoyles and grotesques (for ages 10 and older). 2 p.m. $18 to $22; reservations suggested. Washington National Cathedral, Massachusetts and Wisconsin avenues NW. cathedral.org.