■ Edlavitch D.C. Jewish Community Center will host a “Little Flippers,” “Tadpoles,” and “Guppies” swim class for kids from 4 months to 5 years old in separate sessions between 10:30 a.m. to 1 p.m., part one of an 8-week early introduction to water for children that includes music and other water activities. 10:30 a.m. to 1 p.m. $90 for members, $128 for non-members. Edlavitch DCJCC, 1529 16th St. NW. 202-777-3242.
■ Marlisa Woods on the violin and Mark Irchai on the piano will play some of the most challenging music written for their respective instruments, including Beethoven’s Kreutzer Sonata and Prokofiev’s Violin Sonata No. 1. 2 to 3 p.m. Free; donations accepted. Live at 10th and G, 945 G St. NW. 202-628-4317.
■ The Phillips Collection announced its concert season for the museum’s music series. The Goldmund String Quartet will appear at 4 p.m. $20 for members and students, $40 for the public. Anderson House, 2118 Massachusetts Ave. NW.
■ Members of the DC Concert Orchestra will play music by Johannes Brahms on the flute and oboe at the Church of the Epiphany. 3 p.m. 1317 G St. NW. 202-347-2635.
■ Piffaro, the Renaissance Band will play at the National Gallery of Art, recreating the music of the late medieval and Renaissance periods using authentic reconstructions of instruments of the period. 3:30 p.m. Free. West Garden Court, National Gallery of Art, 6th and Constitution Ave. NW. 202-737-4215.
Classes and workshops
■ The Washington National Cathedral will hold a Knitting and Crocheting Ministry, where members of the public are welcome to use their crafting skills to make children’s hats, scarves and booties that will be donated to organizations that serve homeless children and families. 1 p.m. Free. 3101 Wisconsin Ave. NW. 202-537-6200. The event will repeat several times until March 18.
■ The Kennedy Center’s Millennium Stage will present Joy of Motion Dance Center, which will provide a free dance class for audience members of all ages. 6 p.m. Free. Millennium Stage, Kennedy Center. 202-467-4600.
Discussions and lectures
■ Profs and Pints presents: “Meet the Real Indiana Jones,” with Justin M. Jacobs, associate professor of history at American University. 6 p.m. $10. Bier Baron Tavern, 1523 22nd St. NW.
■ Gordon Whitman will discuss his new book “Stand Up,” which describes ways that people can make a difference in the world of face-to-face organizing, instead of by sharing social media posts and signing online petitions. 6:30 to 8 p.m. Free. Busboys and Poets, 5th and K streets NW. 202-789-2227.
■ The Avalon Theatre will host “Canaletto and the Art of Venice.” 10:30 a.m. $7.50 to $12.50. The Avalon Theatre, 5612 Connecticut Ave. NW. Will show again on Jan. 23 at 10:30 a.m.
■ The National Gallery of Art will hold a screening of two separate video essays about end-of-life care from radical perspectives, including Su Friedrich’s “I Cannot Tell You How I Feel” and Stanya Kahn’s “Stand in the Stream.” 4 p.m. Free. National Gallery of Art, 6th and Constitution Ave. NW. 202-737-4215.
■ On the one-year anniversary of the Women’s March, Sixth and I Synagogue will host “Empow(HER)ed: An Evening of Arts and Activism,” which will feature musicians, spoken word artists, storytellers and thought leaders celebrating the creativity and power of women’s voices. 7 p.m. $8 in advance, $10 at the door. Sixth and I, 600 I St. NW. 202-408-3100.