8 pm: Music

These are not your grandma’s string quartets. To close the Southwest Chamber Music season, the resident string quartet--violinists Agnes Gottschewski and Christine Frank, violist Jan Karlin and cellist Maggie Edmondson--offer music from North America: Revueltas’ Quartet No. 4, “Musica de Feria,” the slow movement from the Quartet (1931) by Ruth Crawford Seeger, Leo Wadada Smith’s String Quartet No. 1 and “La Hija de Colquide” by Carlos Chavez.

* Southwest Chamber Music at Pasadena Presbyterian Church, 585 E. Colorado Blvd., Pasadena. 8 p.m. $10 to $20. Also, Tuesday at 8 p.m. in Herbert Zipper Concert Hall at the Colburn School of Performing Arts, 200 S. Grand Ave., downtown L.A. (800) 726-7147.

all day: Art Fair

The L.A. Modernism Show highlights the best in fashion and decorative and fine art from the past 100 years. American and international galleries and dealers will exhibit and sell works such as Art Deco appliances, Bakelite accessories, Arts and Crafts-period ceramics, Cubist furniture and vintage clothing and jewelry.

* L.A. Modernism Show at the Santa Monica Civic Auditorium, 1855 Main St., Santa Monica. Saturday, 10 a.m.-7 p.m.; Sunday, 11 a.m.-5 p.m. $10; under age 16 with an adult, free. (310) 455-2886.

9 pm: Pop Music

On “One Endless Night,” his first album in four years, Jimmie Dale Gilmore mainly digs into material by some fellow Texans, including Butch Hancock, Willis Alan Ramsay and the late Townes Van Zandt. But true to his reputation as a cosmic troubadour, Gilmore also throws a curve with his treatment of Brecht-Weill’s “Mack the Knife.”

* Jimmie Dale Gilmore at the House of Blues, 8430 Sunset Blvd., West Hollywood. 9 p.m. $15. (323) 848-5100. Also Sunday at the Coach House, 33157 Camino Capistrano, San Juan Capistrano. 8 p.m. $14.50. (949) 496-8927.

8:30 & 10 pm: Jazz

Percussionist Bobby Matos’ Afro-Latin Jazz Ensemble covers the entire rhythmic spectrum, from Cuba and the Caribbean to Central and South America, incorporating those beats into jazz standards and originals alike.

* Bobby Matos’ Afro-Latin Jazz Ensemble at Catalina Bar & Grill, 1640 N. Cahuenga Blvd., Hollywood. 8:30 and 10:30 p.m. $12. Also Sunday, 7:30 and 9:30 p.m. $12. Also Mother’s Day brunch, Sunday at noon. $25 (includes brunch and champagne). (323) 466-2210.

All day: Festival

A new garden will be unveiled during the Arboretum of Los Angeles County’s inaugural Japanese Iris Festival. The flower collection, developed by the renowned Kamo Nurseries in Japan, includes 35 varieties of iris ensata, the largest of all irises. Lectures, origami lessons and taiko drum and koto performances will also take place Saturday. Classical Japanese dancing, a tea ceremony and a Japanese folk music performance are set for Sunday afternoon.

* Japanese Iris Festival at Arboretum of Los Angeles County, 301 N. Baldwin Ave., Arcadia. Saturday and Sunday, 9 a.m.-4:30 p.m. $5. (626) 821-3222.

8 pm: Theater/Family

“Mirette,” a girl in 1890s Paris whose mother runs a boarding house for circus performers, finds her life changed by a mysterious high-wire walker in Fullerton Civic Light Opera’s West Coast premiere. The new family musical is by “Fantasticks” creators Harvey Schmidt and Tom Jones, with book by Elizabeth Diggs.

* “Mirette” at Plummer Auditorium, Chapman and Lemon streets, Fullerton. Thursdays-Saturdays, 8 p.m.; Sundays, 2 p.m. Also May 21, 2 and 7 p.m. Ends May 28. $15 to $36. (714) 879-1732, (714) 526-3832.

11 am: Fiesta

Life in early Orange County will be re-created at the Rancho Days Fiesta, with live music, Ballet Folklorico and costumed historical actors. The buildings in Heritage Hill Historical Park will be open for tours led by costumed docents. Visitors can also make homemade ice cream and sweet butter. For kids, there are pony rides, pinatas and crafts.

* Rancho Days Fiesta at Heritage Hill Historical Park, 25151 Serrano Road, Lake Forest. 11 a.m.-4 p.m. $3; children, $2. (949) 855-2028.

*

FREEBIE: Polli Chambers-Salazer presents the interactive performance lecture “Picasso in the 20th Century: The Music of His Time” at 4 p.m. at One Colorado Courtyard, 24 E. Union St., Pasadena, in conjunction with “Picasso: Graphic Magician,” on view at the Norton Simon Museum. (626) 564-1066.