Although nurses are the primary care providers for hospitalized and vulnerable older adults living in the community, they are generally not prepared in geriatric care. This study examined the effect of a 21-hour nursing education program on nurses’ knowledge and attitudes regarding care of older adults and the geriatric nursing certification of the participants. The program was offered to 92 nurses in three cohorts over a 1-year period. Participants completed pre- and posttest measures of geriatric knowledge and attitudes. Significant differences were found between pretest and posttest knowledge and attitudes. Program evaluation and success in achieving certification in gerontological nursing also indicated a positive effect of the program.