October 30

American Red Cross Hawaii Chapter, 4155 Diamond Head Road, 9 a.m.-3:20 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. Pre-registration required. (1-800-733-2767, redcross.org/take-a-class)

American Red Cross Hawaii Chapter, 4155 Diamond Head Road, 9 a.m.-2:30 p.m., $90. Get trained to recognize and care for victims of illness and sudden injuries and learn how to administer CPR and use an AED for life-threatening respiratory or cardiac emergencies on adults. Pre-registration required. (1-800-733-2767, redcross.org/take-a-class)

Still & Moving Center, 5:30 p.m., $30. Dangle, stretch and integrate your bones in aerial hammocks, silks or lyra — with glow-in-the-dark paint! (397-7678)

Hanauma Bay Nature Preserve, Education Alcove Classroom, 3-4 p.m., free. Jesse Bohlander talks ““2016 Northwestern Hawaiian Islands monk seal field update: Debris, Eels, and Buckets, Oh My!” (397-5840)

Holy Family Catholic Academy, 7:30-11:30 a.m., free. Donate blood and save lives. Pre-registration recommended. (848-4770, bbh.org)

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

Neal S. Blaisdell Center, Hawaii Suites, 9 a.m.-3 p.m., free. A crafter’s clearance sale also will take place throughout the day. (nanstar@hawaii.rr.com)

Nanakuli Door of Faith Mission, 2-7 p.m., free. Get free medical screenings of lung, glucose, blood pressure, vision, diabetes, hepatitis and more, plus enjoy live music, country store, food, snacks and more. (478-9883)

94-396 Hokuili St., Oct. 30 and 31, 6:30-9 p.m., free. The Nakamura family host their island-famous haunted house, with new thrills and chills. (623-6308)

Still & Moving Center, 1024 Queen St., 6 p.m., $15. Women of all ages are welcome to explore who they are, receive support, share with others and more. Bring a vegetarian dish for potluck. (397-7678)

Turtle Bay Resort, 2-4 p.m., $5. A freestyle surf event for surfers of all ages and skill levels in their best superhero garb. (293-6000, turtlebayresort.com/surfjam)

Waipahu Hongwanji, 8 a.m.-noon, free. Rummage sale, bake sale, crafts, live plants and concessions. (677-4221, waipahuhongwanji.org)

Honolulu Friends Meetinghouse, 2426 Oahu Ave., 3-5:30 p.m., free. Enjoy donuts on a string, bobbing for apples and pizza. Come in costume. Hosted by the Religious Society of Friends. (536-0783, anthonybchang@live.com)

Haleiwa Store Lot, Kamehamalu Courtyard, 1 p.m., free. Keiki can compete in a costume contest and then enjoy trick-or-treating at participating merchants. (facebook.com/haleiwastorelots)

Tiki’s Family Fun Center, 4-9 p.m., $20.99. Play unlimited laser tag, participate in a costume contest and mention Dis-N-Dat for 10 percent off food purchases. (tikisfamilyfuncenter.com)

Lola’s Grill & Pupu Bar, 6-9 p.m., free. (596-8878)

Kapiolani Bandstand, 2 p.m., free. (922-5331)

Blaisdell Concert Hall, 4 p.m., $92-$34. Hawaii Symphony Orchestra performs Wagenaar’s “Overture to The Taming of the Shrew,” Bruch’s “Violin Concerto No. 1” and Holst’s “The Planets,” the latter being a multimedia experience. (hawaiisymphonyorchestra.org)

Outrigger Reef Waikiki Beach Resort, 11 a.m.-1 p.m., $115. Hawaii Food and Wine Festival hosts a battle of brunch as chefs Lee Anne Wong Sven Ulrich fight to retain their crown against Wade Ueoka and Michelle Karr Ueoka, and Celine Tio and Colin Hazama. (hawaiifoodandwinefestival.com)

Honolulu Club, 6-10 p.m., $50. 808 Cleanups hosts a costume party with drinks, pupu, a DJ and more. Proceeds go to the Adopt a Site program. (808cleanupshalloween.eventbrite.com)