•Harbor Hospital rheumatologist William Yap will discuss the latest in arthritis treatments at 6 p.m. Jan. 20 in the hospital's Baum Auditorium, 3001 S. Hanover St. Registration is required; a light dinner will be served at 5:30 p.m. Call 410-350-2563 or visit harborhospital.org/classes.

•Howard County General Hospital will hold a prenatal class from 7 p.m. to 9 p.m. Jan. 20 for parents-to-be in the first three months of pregnancy at the Medical Pavilion at Howard County, 10710 Charter Drive, Suite 100, in Columbia. Free. Call 410-740-7601 or register online at hcgh.org.

•Tai Sophia Institute will hold an open house to provide information about its graduate programs in acupuncture, wellness and more from 9:30 a.m. to 12:30 p.m. Jan. 23 at its campus, 7750 Montpelier Road, Laurel. Prospective students can speak with admissions counselors, participate in seminars with faculty, and tour the institute's library and wellness clinic. Free. For information, call 410-888-9048, ext. 6647 or e-mail admissions@tai.edu.