October 28

Best Buy, Aiea, Bloodmobile, 9 a.m.-2 p.m., free. Donate blood and save lives. Pre-registration recommended. (848-4770, bbh.org)

Kahala Mall, Bloodmobile, 1-5 p.m., free. Donate blood and save lives. Pre-registration recommended. (848-4770, bbh.org)

Koko Marina Center, Bloodmobile, 7-11 a.m., free. Donate blood and save lives. Pre-registration recommended. (848-4770, bbh.org)

Mililani Market Place, Bloodmobile, 7-11 a.m., free. Donate blood and save lives. Pre-registration recommended. (848-4770, bbh.org)

Royal Hawaiian Center, Royal Grove, 3-5 p.m., free. Branded as the largest costume contest in the state, keiki age 10 and under, and their parents, are invited to compete in a variety of themes with first-, second- and third-place prizes in four categories, in addition to an overall grand prize winner. Pre-registration required. (royalhawaiiancenter.com/events)

Haleiwa Store Lots, 2 p.m., contact for cost. Join a costume contest featuring three age groups: children age 3 and under, ages 4-8 and ages 9-12. The first 50 entries will be accepted for each age group. Each group will be awarded first-, second- and third-place winners. (haleiwastorelots.com)

Kailua District Park, meeting room, 1:30-4:30 p.m., free. Join a meet and greet with 2018 candidates Cynthia Thielen, Ron Curtis, Brian Evans and more. (totowaterhouse@gmail.com, 343-8554)

Aloha Stadium, parking lot, contact for cost. Try four timed laps at the Sports Car Club of America solo/autocross course in competition with other cars, SUVs and trucks. (sccahawaii.org)

Waipahu Hongwanji Buddhist Temple, 94-821 Kuhaula St., 8 a.m.-noon, free. Enjoy a rummage sale with homemade baked goods and crafts, live plants and concessions. (677-4221, waipahuhongwanji.org)

Bishop Museum, 1525 Bernice St., 10 a.m.-2 p.m., free with admission. This free community event is designed to promote healthy, active lifestyles, exercise and nutrition, and injury prevention. There will be activities such as a Blend-It! smoothie station, keiki Zumba, an Incredibles obstacle course, teddy bear clinic and more. There will also be free snacks and giveaways while supplies last. Children ages 4-12 can enter a drawing to win one of 50 bicycles and helmets. (522-3469, hawaiipacifichealth.org/kidsfest)

Anna O’Brien’s, 6 p.m., $10. Enjoy a performance by an Irish band from Japan, with local Irish traditional band Celtic Waves opening. (irishpubshawaii.com)

Buho Cocina y Cantina, 10 p.m.-1 a.m., $10. Join a late-night Buho-style Halloween bash, featuring a midnight costume contest and dedicated to the hardworking hospitality industry. There will be drink specials and tacos served all night. (922-2846, buhocantina.com)

Ala Moana Center, centerstage, 1 p.m., free. (alamoanacenter.com)