As a CNA you can work a 6am-3pm, 3pm-11pm, or 11pm-6am shift, 12 hour shift, also depends on weather. I remember a year ago we got a bad storm and I was taken care of the clients for 38 hours. We finally had someone able to come in. It is a requirement to work holidays most of the time until you start getting experienced. You have to be approved by the board, have certification of CPR, too. You take a written and hands-on test. It is all timed. I loved working with all the people. However, I went back to school and became a therapist.