It really depends on the facility, and what type of work you decide to do as a CNA. In LTC & assisted living facilities (ALFs), they usually go by 8 hour shifts: 7-3, 3-11,11-7 or 6-2, 2-10, 10-6. In hospitals, some of them will also use 8 hour shifts, but most of the ones that I know of use 12 hour shifts: 7am-7pm, 7pm-7am or 8am-8pm, 8pm-8am.. Now if you consider working in home health, those hours will vary. For example, I worked in home health for about 6 months. One of my cases was from 8am-1pm, and from 8am-6pm on weekends. Another one was from 1pm-5pm. Some cases will be live-in help, meaning you may live with them for 7 days, and then have 7 days off.