I did something similar when I worked in IT Operations at Stelco. It's pretty easy to get used to.. We'd flip flop every other weeks days/nights. Did that for about 2 years.
My next job was in IT again and for the next 5 years we did 4on, 3off, 3on, 4off. 1month of days, 1 month of nights. That 4th day could be a killer and that first night shift was a tough ride home but again, you get used to it.
Having a somewhat normal job now (7-3, work from home 4 days a week) seems like a vacation to be honest, lol.