"Deep in the Vaults of Texas" at LBJ Library.Ten museums and archives at the University of Texas, along with the LBJ Presidential Library, share some of their most compelling and rare artifacts in a new exhibit. See Tom Landry’s hat, Santa Anna’s memoir and much more. 9 a.m. to 5 p.m. daily through Sept. 6. $3-$8. LBJ Library, 2313 Red River St.lbjlibrary.org.

Earth Day Austin.With eight new activity areas and a focus on hands-on discovery, this year’s Earth Day aims to be more engaging and exploratory than ever, with everything from solar cars, a renewables marketplace, eco art, a rain garden installation and more. The festival moved to a bigger venue this year with both indoor and outdoor spaces but will still have some returning favorite activities, such as the Modern Vehicle Zone and Tiny House Exhibits. Noon to 7 p.m. April 22. Free. Huston-Tillotson University, 900 Chicon St.earthdayaustin.com.

Sunset Valley ArtFest.The festival hosts a variety of Central Texas artisans and their wares, displays of paintings, music, jewelry, crafts, local foods, and much more. Live music from local musicians will be played throughout the day on a main stage and kid’s stage. These acts include the Tejas Brothers, Guy Forsyth Blues Band, Lost and Nameless, and the Bowie High School Steel Drum Band. Mr. Will with Warren Hood and the Biscuit Brothers will play on the popular kid’s stage. The South Austin YMCA will also have their youth dancers on stage in between the musical acts. 9 a.m. to 4 p.m. April 22. Free. Outside the Toney Burger Center, 3205 Jones Road., Sunset Valley.sunsetvalley.org/artfest.

Texas Folklife’s Big Squeeze Finals and Concert.Ten finalists, all 21 years or younger, will compete for three grand prizes in three categories at this accordion contest. Each one will perform, with a focus on either Cajun and Zydeco, Czech/German/Polish Polka and Conjunto, in front of an audience and the judges. Following their performances — and while the judges deliberate — a free concert will be held. The afternoon concert will feature conjunto masters Rio Jordan from San Antonio, Houston zydeco powerhouse Ruben Paul Moreno and the ever-popular Cajun sounds of the Gulf Coast Playboys. 1 to 5 p.m. April 22. Free. Bullock Texas State History Museum, 1800 Congress Ave.texasfolklife.org.

19th Annual Butterfly Festival in Wimberley.Watch 3,800 butterflies take flight at this annual fest. Since late March, area students and businesses have been carefully tending cages of caterpillars. Their hard work and waiting will pay off as beautiful Painted Lady butterflies emerge from their chrysalises, ready to be released at the festival. The all-day event will have a variety of games, crafts, nature activities, live entertainment and, of course, butterfly releases throughout the day. Games and crafts cost $2-$4. 9 a.m. to 5 p.m. April 22. Free. EmilyAnn Theatre & Gardens, 1101 FM 2325.emilyann.org/butterfly.html.

COMING SOON

New Sweden Heritage Center’s 4th Annual Heritage Day May Fest.View displays at the Heritage Center and enjoy a home-cooked traditional Swedish meal. Plus silent auction, maypole and more. Events begin at 3 p.m. May 6. Meal tickets are $15 ($8 for children 4-9) and must be purchased by May 2 by calling the church office at 512-281-0056. 12809 New Sweden Church Road, Manor.newswedenelca.org/content/may-fest-celebration4th-annual-heritage-day-may-62017