February 28

American Red Cross Hawaii Chapter, 4155 Diamond Head Road, 8:30 a.m.-3 p.m., $110. Get trained to recognize and care for victims of illness and sudden injuries and life-threatening respiratory or cardiac emergencies in adults, children and infants and learn how to use an AED. (1-800-733-2767, redcross.org/take-a-class)

American Red Cross Hawaii Chapter, 4155 Diamond Head Road, 8:30 a.m.-11:30 a.m., $70. Learn to recognize and care for victims of life-threatening respiratory or cardiac emergencies and to use an AED on adults. (1-800-733-2767, redcross.org/take-a-class)

Verizon Wireless at Kapolei Commons, 8:45-9:45 a.m., free. Attend this workshop and learn about the great features of your iPhone. During this workshop Verizon experts will show you how to use features like Maps, Siri (not available on all models), FaceTime, the app store and much more. Pre-registration required. (vzwworkshops.verizonwireless.com/vzwworkshops/)

Honolulu Country Club, 1690 Ala Puumalu St., 9-11 a.m., free. Homeowners looking to build a new home will discover where to start, how to select a builder, what to watch out for and more. Pre-registration required. (593-2808, grahambuilders.com)

American Red Cross Hawaii Chapter, 4155 Diamond Head Road, 8:30 a.m.-3 p.m., $110. For those with a duty to act (professional rescuers) learn skills needed to respond appropriately to breathing and cardiac emergencies. This course includes two-man CPR method, use of an automated external defibrillator (AED) and bag-valve mask to care for cardiac arrest and breathing emergencies. (1-800-733-2767, redcross.org/take-a-class)

Halawa Xeriscape Garden, 99-1268 Iwaena St., 10:30 a.m.-noon, $5. Learn aquaponics techniques and save on outdoor water use. Pre-registration required. (748-5363, workshops@hbws.org)

Still & Moving Center, 1024 Queen St., 2-5:15 p.m., $40-$105. Learn to strengthen your pelvic floor, diaphragm, eyes and more. (397-7678)

Mililani Public Library, 10:30 a.m., free. Author Clear Englebert discusses the common feng shui problems in and around Oahu homes and what can be done to resolve them. (627-7470)

SpaHalekulani at Halekulani Hotel, 11 a.m., $25. Halekulani lifestyle coach Kamala Skipper presents “Increasing the YUM Factor” at the hotel’s spa, discussing how to enhance your meals and receive the most nutrients for overall enjoyment. (931-5322, halekulani.com/living-well-lecture-series)

The Green House, 224 Pakohana St., 10 a.m.-noon, $25. Immense yourself in the wonderful world of natural cleaning by creating a batch of handmade soap and re-imagine the cleaning recipes our grandmothers used to make. Pre-registration required. (524-8427, thegreenhousehawaii.com)

Happiness U, 560 N. Nimitz Hwy. #117A, 12:30-1:30 p.m., free. Hear from founder Alice Inoue about how it is possible to change your life by changing your focus, and experience firsthand what Happiness U has to offer. Pre-registration required. (yourhappinessu.com)

Foster Botanical Garden, 180 N. Vineyard Blvd., 9:30 a.m.-11:30 a.m., $5/park admission. Information on shooting macro, flower pictures, cameras, accessories, equipment, and techniques. The workshop will feature photo shoots at each of the Botanical Gardens to practice techniques, learn about each of the botanical gardens, and what is blooming. Bring a DSLR or a camera with macro mode. (220-4529)

Mulkern Nursery, 10 a.m., free. Bring your lotus plant and learn the ins and outs of lotus repotting, an important feat to ensure good growth. Lotus tubers (roots) will be available to purchase after the class. (396-6595, mulkernlandscaping.com)

Sacred Hearts Academy, 3253 Waialae Ave., 8-11:30 a.m., free, girls in grades 5-8. Learn more about science through hands-on workshops, and hear from Nina Davuluri, Miss America 2014. Pre-registration required. (734-5058, sacredhearts.org/sciencesymposium)

Koko Head Elementary School, 8:30 a.m.-2:30 p.m., $75. Elemental Minds hosts a STEM camp with two engineering projects — projectile launchers and scissor arm extendors. Pre-registration required. (ithinkiplayilearn@gmail.com, elementalminds.org)

Windward Community College, Hale Kuhina 114, 45-720 Keaahala Rd., 9 a.m.–12 p.m., $80 plus $10 lab fee. Take family photos like a pro, and photograph great outdoor scenery. Learn the simple techniques of digital photography and how to use your camera in different modes. (235-7433, windwardcce.org/photography)

Kapolei High School portable 1, 91-5007 Kapolei Pkwy., 9 a.m.-noon, $15/person, $40/families of three. Create your own ‘ukeke, an indigenous stringed instrument of Hawaii. Pre-registration required. (malamalearningcenter.org, 483-0678)

Hauula Elementary School, 9 a.m.-noon, free. Check website for acceptable and unacceptable materials. (kokuahawaiifoundation.org, 3rs@kokuahawaiifoundation.org)

Ko Olina Beach & Sports Club, 8-11:15 a.m., free. Donate blood to Blood Bank of Hawaii. (848-4770, bbh.org)

Town Center of Mililani, 7 a.m.-1:15 p.m., free. Donate blood to Blood Bank of Hawaii. (848-4770, bbh.org)

Neal Blaisdell Center – Hawaii Suites, 9 a.m.-3 p.m., free. Featuring local vendors selling a variety of crafts, gift items and supplies. A large Crafter’s Clearance Sale will also be held. (nanstar@hawaii.rr.com)

Kaimuki High School parking lot, 2705 Kaimuki Ave., 8 a.m.-3 p.m., free. Materials accepted include computers, monitors, laptops, printers, fax machines, severs, telecom equipment, toner, etc. No TVs, alkaline batteries, microwaves or home appliances. No quantity limits. (ewastehawaii.com, 488-8870)

Pearlridge Center Uptown Center Court, 10 a.m.-2 p.m., free. Enjoy fashion shows, mini-makeovers, bang trims, insider tips, health sessions, fitness demonstrations and more. (203-2366)

Leeward Community College, 10 a.m.-3 p.m., free. Attendees can enjoy hands-on workshops and demonstrations on a variety of digital, mobile and technology topics, from wearable technology, drones and 3D printing, to GoPro videos and Instagram, plus a Digital Cafe and more. (leeward.hawaii.edu/geekday)

Barnes & Noble, Ala Moana, 1-2 p.m., free. Robbie Alm signs his book, “The Faith of Leadership: Insights from Hawaii’s Leaders.” (587-7766, bookshawaii.net)

Bishop Museum’s Castle Memorial Building, Feb. 28-Sept. 7, 9 a.m.-5 p.m., $8.95-$19.95. A dozen lifelike animatronic dinosaurs with interactive stations and activities explaining how these animals flourished in their respective environments. (847-3511, bishopmuseum.org)

Living Art Marine Center, 3239 Ualena St., 10 a.m., $9.95-$14.95. Tour through a fish exporting warehouse, where visitors can see how Living Art Marine Center’s fish arrive, stay for a while and then journey all over the world to pet stores, aquariums and research facilities. (841-8080, livingartmarinecenter.com)

Meet in Kaneohe Burger King parking lot, 9 a.m.-1 p.m., $10-$20/recommended donation. Carpool huaka‘i to see five cultural sites and hear mo‘olelo about these areas, with some hiking. Pre-registration required. (235-8111, legendsofkoolau@aol.com)

Hike runs along Old Pali Road Trail, call for meeting place and times, free. Take a pet-friendly hike with your furry friend and other animal lovers. (356-2222)

Snappers Sports Bar & Grill, 1778 Ala Moana Blvd., 9 p.m.-1 a.m., free, age 21 and up. Fourth Saturdays with 11th Hour. (347-1323)

Hawaii Kai Public Library, 249 Lunalilo Home Road, 2:30 p.m., free. Experience a performance by Irish band Celtic Waves, with contemporary and folk music from Ireland and Scotland. (397-5833)

Atherton Performing Arts Studio, 738 Kaheka St. #101, 7:30-9:30 p.m., $15-$30. Enjoy music from singer/songwriter Doug Fitch, joined by Milan Bertosa and Sunway. (955-8821, brownpapertickets.com/event/881401)

Jazz Minds Art and Cafe, 1661 Kapiolani Blvd., 9 p.m., $5. (945-0800)

On Stage Drinks and Grinds, 802 Kapahulu Ave., 8:30 p.m.-12:30 a.m., free. Good Foot performs with special guest Kevin Hughes. (738-0004, onstagedrinksandgrinds.com)

Medici’s at Manoa Marketplace, 2754 Woodlawn Drive #7-103, 7:30-10:30 p.m, $15. Rachel Gonzales and Soul Pilot perform soulful rhythms from the ‘70s, ‘80s and present. (351-0901)

The Palladium at Ala Wai Golf Course Clubhouse, 404 Kapahulu Ave., 6-9:30 p.m., $10. Dance to the glamorous style of Las Vegas with pop standards and oldies sung by Pat “King” Koh. (party2oldies.webs.com)

Hawaiian Brians, 1680 Kapiolani Blvd., 9 p.m.-2 a.m., $5, ages 18 and up. Enjoy reggae vibes. (deltabetaomega@gmail.com)

Temple Emanu-El, 2550 Pali Hwy., 7:30 p.m., free. Jewish musician and founder of Jewish Rock Radio Rick Recht performs a rock-pop mix of Jewish and Israeli-themed music. (595-7521, shaloha.com)

Windward Mall, center court, 1-2 p.m., free. Ukulele virtuoso Taimane Gardner performs. (235-1143)

Bar 35, 35 N. Hotel St., 9 p.m.-2 a.m., $5, ages 21 and up. 80s Pop Muzik presents the fifth anniversary party and a tribute to post punk with Super Hi-Fi, plus guest DJ Gary O, and resident DJs Nocturna and Rhombus. (bar35hawaii.com)

Rumours Nightclub at Ala Moana Hotel, 5 p.m., $20/pre-sale, $25/at the door. The 63rd Cherry Blossom Festival Queen Contestants enjoy a night of fun and dancing with family, friends and supporters. (cbfhawaii.com)

Kamehameha Schools, Kapalama Campus, 8:30 a.m.-4 p.m., free. The Hawaiian community’s biggest event of the year features musical entertainment, a country store, silent auction, arts and crafts, food, carnival rides, games and more. (facebook.com/hoolauleakamehameha, parents.ksbe.edu)

Ala Moana Center Centerstage, 5-5:45 p.m., free. (alamoanacenter.com)

Tenney Theatre, Feb. 28 at 9:30 and 11:30 a.m., $10, ages 3 and up. Honolulu Theatre for Youth presents the world premiere of “Happy” by Annie Cusick Wood. (839-9885, htyweb.org)

eleven44, 1144 Bethel St., 7-9 p.m., $45-$55, ages 21 and up. Enjoy all-you-can-eat sushi, beer, free body painting, live art and performances from Cherry Lei, Madam X and Linda Kuo. Reservations required. (nhoopii808@yahoo.com)

Kuhio Beach Hula Mound near Duke Kahanamoku statue, 6:30-7:30 p.m., free. Lilinoe Lindsey and Ka Pa Nani O Lilinoe perform. (843-8002)

Visit website for site locations on Oahu, Feb. 28 and March 28, 8 a.m.-12:15 p.m., free. Hawaiian Islands Humpback Whale National Marine Sanctuary is looking for volunteers to count whales and record their behaviors. (hawaiihumpbackwhale.noaa.gov/involved/ocwelcome.html)

Location provided with registration, 9 a.m.-noon, free. Help Hui o Koolaupoko restore Hakipu‘u Stream. Pre-registration required. (huihawaii.org/hok-rsvp-form.html)

Pouhala Marsh in Waipahu, meeting place provided with signup, 8:30-11:30 a.m., free. Help Hawaii Nature Center restore the wetlands in West Oahu. (955-0100 ext. 118, volunteer@hawaiinaturecenter.org)