What's happening in the next few weeks:
* The 31st annual Cherry Blossom Festival, April 18-19 and 25-26, will include performances, demonstrations and exhibits of traditional Japanese martial arts, origami, calligraphy, ikebana (flower arranging) and more. 11 a.m.-6 p.m. both weekends; parade April 26, 1-4 p.m. Festival admission free; some performances require ticket purchase. Japantown between Fillmore and Laguna streets. (415) 563-2313.
* Ferenc Molnar's "The Guardsman," which runs May 13-June 7 at American Conservatory Theater, is a game of marital hide-and-seek in which a doubting husband--who is a famous actor--uses his skills to disguise himself as a member of the elite Russian guard to test his new wife's fidelity. Geary Theater Box Office, 405 Geary St. at Mason. (415) 749-2ACT.
* The San Francisco Ballet presents Tchaikovsky's "Swan Lake," April 25-26, 28-29, May 1, 3, 7 and 9. Program VII, April 30, May 2, 5-6, 8 and 10 includes "Maelstrom" (Beethoven and Morris), "Silver Ladders" (Tower and Tomasson) and "El Grito" (various composers). War Memorial Opera House, 301 Van Ness St. (415) 865-2000.
* Continuing through May 31 at the San Jose Museum of Art: "We Shall Overcome: Photographs From the American Civil Rights Era." 110 S. Market St., San Jose. (408) 294-2787.
* At the Exploratorium May 22-Jan. 10: "Memory," an exhibition that lets visitors experience unconscious memory processes, discover early memories, learn about forms of memory and more. Palace of Fine Arts, 3601 Lyon St., (415) 561-0360.