Total joint Tuesday -- Ecker Business Center, 6751 Columbia Gateway Drive, Columbia / Learn the common causes of knee pain and available treatments. Speaker is James E. Wood Jr., Harbor Hospital's chief of orthopedics. 5:30 p.m. Tuesday. Preregistration required: 410-350-2563.
Health fair -- University Plaza Park, across from the University of Maryland Medical Center, 22 S. Greene St. / There will be free screenings, giveaways, health information and raffles. 10 a.m.-2 p.m. Wednesday. Free. Information: 800-492-5538.
Type 2 diabetes -- Greater Baltimore Medical Center's Geckle Diabetes & Nutrition Center, 6569 N. Charles St., Physicians' Pavilion East, Suite 507, Towson / Days and times vary. Registration: 443-849-2036.
Walking program -- Honeygo Run Regional Park, off Honeygo Boulevard / 9:30 a.m.-10:30 a.m. Mondays-Fridays. Free. Information: 888-74-OBTLC.
Walking program -- Harbor Hospital, held at the Centre at Glen Burnie, 6711 Ritchie Highway / 8 a.m.-10 a.m. daily. Free. Registration required. 410-350-8255.
Colorectal cancer -- Baltimore County Department of Health, 6401 York Road / Free colorectal cancer screenings for Baltimore County residents who meet income and age requirements. 410-887-3456.
Breast and cervical screenings -- Franklin Square Hospital Center, 9000 Franklin Square Drive / Screenings for women ages 40 to 65 who meet income requirements. Free. 443-777-8138.
For calendar listings, e-mail releases four weeks in advance to email@example.com or mail typed news releases to Health Calendar, Features, The Sun, 501 N. Calvert St., Baltimore 21278.