May 20

Halawa Xeriscape Garden, 10:30 a.m.-noon, $5/non-members. Learn how to make your aquaponics system flourish from HappyPonics Farm. Pre-registration required. (748-5315, workshops@hbws.org)

The Surfjack Hotel & Swim Club, 4-6 p.m., $45. Island Bungalow Hawaii teaches the art of block printing on tea towels. (islandbungalowhawaii.com)

UH-Manoa’s Kuykendall 210, 9 a.m.-noon, free. Colin Moore discusses “American Social Policy in the Age of Trump” and “White Rage: Donald Trump and the Politics of Resentment.” (942-8553, cape.edu)

Kapiolani Medical Center for Women & Children, Diamond Head Tower Auditorium, 8 a.m.-3 p.m., $80-$50. Physicians, health professionals and athletic trainers are invited to discuss and learn more about sports medicine topics. Pre-registration required. (hawaiipacifichealth.org/sportsmedicinesymposum)

Kapolei High School, 9 a.m.-noon, $20/individual, $50/families of three. Learn basic preservation techniques to enjoy mangoes year round. Pre-registration required. (malamalearningcenter.org)

RevoluSun Smart Home Innovation Center, 10-11 a.m., free. Learn more about the purchase and installation of Mitsubishi single and multi-zone air conditioning systems. Pre-registration required. (748-8888, revolusun.com)

The Plaza in Waikiki, 10-11 a.m., free. Learn how to navigate the streets safely as pedestrians from Alan Ibrao of HPD. Pre-registration required. (792-5188, info@kupunawiki.com)

Waimea Valley, 8:30-11 a.m., free. Help clean Waimea Valley’s stream beds with Waikiki Aquarium. Wear closed-toe shoes, work clothes, bug and sun protection, and bring a reusable water bottle. (eventbrite.com)

Master Sha Tao Center Honolulu, 885 Queen St., noon-4 p.m., $40. Learn about the fire element and its positive and negative impact on your ability to maintain optimal health. Pre-registration required. (drsha.com/events, 988-8090)

Cake Envy, 3:30-5 p.m., $50/person, $80/couple. This Mother’s Day, shower your mom with a royal tea party at Cake Envy with flowers, tea, champagne, desserts and more. (littlemissteahawaii.com, 202-6968)

Kaneohe Bay Shopping Center, 7 a.m.-noon, free. Donate blood and save lives. Pre-registration recommended. (848-4770, bbh.org)

Mililani Market Place, 7 a.m.-noon, free. Donate blood and save lives. Pre-registration recommended. (848-4770, bbh.org)

Wahiawa Hongwanji, 8 a.m.-noon, free. Donate blood and save lives. Pre-registration recommended. (848-4770, bbh.org)

Windward Mall, Macy’s parking lot, 5-9 p.m., free. East End Hot Rod Club displays its classic vehicles. (235-1143)

Pearlridge Center, Uptown Center Court, 10 a.m.-7 p.m., free. A showcase of local artisans and products that are truly of the islands. (pearlridgeonline.com)

Mililani Public Library, 9 a.m.-3 p.m., free. Find bargains on books, CDs and DVDs. (627-7470)

Waimanalo Polo Field, 9 a.m.-2 p.m., free. Therapeutic Horsemanship of Hawaii presents its annual fair with games, food and craft vendors, pony rides, tack sale, a bounce house and more. (thhwaimanalo.org)

Queen Emma Summer Palace, 10 a.m.-2 p.m., free. Celebrate Prince Albert’s 159th birthday with a keiki tour, activities and a fire truck visit. (daughtersofhawaii.org)

Regency Park Condominium, 3138 Waialae Ave., 9 a.m.-noon, free. Find comics, household treasures, school supplies and more, plus a hot dog and hamburger stand. (737-0314)

Foster Botanical Garden, 9 a.m.-2 p.m., free. Browse plants for sale, plus attend workshops on fruit trees, orchids, bromeliads and more. (537-1708)

Queen’s Beach, May 20-21, check website for times and cost. Young surfers gather to savor sun, surf and friendly competition. (facebook.com/tcsurfgromcontest, 483-8711)

UH-Manoa’s Orvis Auditorium, 7:30 p.m., $35. Chamber Music Hawaii recreates the magical era of silent movies, with classic comedies featuring Charlie Chaplin, Buster Keaton and Harold Lloyd are screened as Chamber Music Hawaii provides the score. (489-5038, chambermusichawaii.org)

Byodo-in Valley of the Temples, 12:30-3:30 p.m., $3-$2. Special guest Asako Takasaki performs with Kit Eversbach, Ian Sheridan, Chuck James and Mihoko M. (239-9844)

Muddy Waters Espresso, 6-8 p.m., free. (778-0182)

The Korner, 9 p.m.-1 a.m., $10, age 21 and up. Bonafide Sound System and The Dawn Patrol Echo Chamber perform. (721-5087)

Kawaiahao Church, 7:30 p.m., free. Honolulu Chorale hosts its 51st annual spring concert. (554-6269, info@honoluluchorale.org)

Ala Moana Center, Centerstage, 7 p.m., free. (alamoanacenter.com)

SALT at Our Kakaako, 5 p.m.-closing, free. This month’s bar crawl features Sierra Nevada Brewing Company and Ballast Point Brewing Company at Village Bottle Shop and Tasting Room, Moku Kitchen and Bevy Bar. Left of Right and DJ Shift provide live music. (saltatkakaako.com)

Wisp Restaurant & Lounge, 2885 Kalakaua Ave., 7 p.m.-1 a.m., $10, age 21 and up. The seventh annual ball is themed “The Summoning of the Muses.” Dress in your best Venetian-inspired costume, and get ready to dine, dance and drink the night away. (djnocturna.wordpress.com)

Paradise Tango, 150 N. King St., Suite 202, 6:30-10 p.m., $20-$25, age 21 and up. Join us for a night of wine tasting, pupu, socializing, a 45-minute Argentine Tango lesson and social dancing. (831-239-6529, info@paradisetango.com)

Iolani Palace, Coronation Lawn, 11 a.m.-3 p.m., free. Celebrate the Manu O Ku (white tern) with music, hula, games, crafts, costume contests, digital photo exhibits, bird tours, snacks and more. (593-0255, manuokufestival.org)

Palama Settlement, 810 N. Vineyard Blvd., 5:30-8:30 p.m., $220-$60. Watch a comedic murder mystery play set in the 1960s, then use your sleuthing skills to interrogate suspects and solve the case. Proceeds benefit the settlement’s Pakolea Program. (palamasettlement.org/mystery, dkawada@palamasettlement.org, 848-2503)

Hawaii Convention Center, 5 p.m. doors open, $170-$135. The 40th annual Na Hoku Hanohano Awards celebrate the best in Hawaiian music, with special performances by Hawaiian Style Band, Pure Heart and many more. (nahokuhanohano.org)

Blaisdell Center, May 20-21, 10 a.m.-5 p.m., $5.50. The 20th annual New Baby Expo is a one-stop shop for play, fun, education and shopping for essential and unique items for babies and toddlers with more than 150 exhibitors. (newbabyexpo.com, 239-7777)

Doris Duke Theatre, May 20-24, check website for schedule and cost. Check out a unique collection of culturally based animated films from around the world. (honolulumuseum.org/events/films, caff.twiddleproductions.com)

RSVP for meeting place, 9 a.m.-noon, free. Help Hui o Koolaupoko remove invasive species and replant native plants along a portion of Heeia Stream. (volunteer@huihawaii.org)