April 7

Castle Medical Center, 6-8:30 p.m., $30/two people. In this class, learn how to tell if your baby is sick, how to take your baby’s temperature, why babies cry, how to calm a crying baby and how to bathe your baby. Pre-registration required. (263-5400, castlemed.org)

UH-Manoa’s Agricultural Sciences Bldg., Room 219, 4:30-9 p.m., free. Learn to write effective grants for USDA Agricultural Marketing Service programs. Pre-registration required. (snakamo@hawaii.edu, 956-8125)

Hawaii Pacific University, 45-045 Kamehameha Hwy., 9 a.m.-2 p.m., free. Donate blood to save lives. Appointment recommended. (848-4770, bbh.org)

UH-Manoa Campus Center Ballroom, 2465 Campus Road, 8 a.m.-3:30 p.m., free. Donate blood to save lives. Appointment recommended. (848-4770, bbh.org)

Wahiawa General Hospital, 128 Lehua St., 7:30 a.m.-1:30 p.m., free. Donate blood to save lives. Appointment recommended. (848-4770, bbh.org)

Pearlridge Center, parking lot in front of Chili’s, 7:30 a.m.-12:30 p.m., free. Donate blood to Hawaii Blood Bank. (203-2366)

UH West Oahu, 7 p.m., $25. Galliard String Quartet will perform. (489-5038)

Jazz Minds Art and Cafe, 1661 Kapiolani Blvd., April 7 and 21, 9 p.m., $5. (945-0800)

Windward Mall, center court, 5:30-7:15 p.m., free. Get ukulele lessons from Ukulele Club of Hawaii. Bring your own ukulele or borrow one from a limited supply. (235-1143)

The ARTS at Marks Garage, 5-8 p.m., free. Hawaii Shakespeare Festival hosts open auditions for its 14th season, with performances running July 10-Aug. 23 at The ARTS at Marks Garage. (256-6657, hawaiishakes.org)

UH-Manoa’s Art Auditorium, 5:15-5:50 p.m. reception, 6-7:30 p.m. lecture, free. Phil Jung places his latest body of work, an exploration of the extremely complex social system on the island of O‘ahu, into the historical context and long tradition of photographers who examine the American cultural landscape. (956-6888)

Kapolei Public Library, 6:30 p.m., free. A family-friendly performance of “The Pirates of Penzance.” (693-7050)