I know people who write full time and make a living at it, but most writers have to have a day job, or other financial support, so that they can pay the bills and provide for their families. They write when they can — between patients, early in the morning, instead of TV — a police officer by day and a writer of romances by night, as it were. 

My day job is household management.  My wife has an outside job, to provide our living, and I stay home and run the house. It’s a good job, from six in the morning till eleven at night — though not straight through. I am not paid in money, but in kind: a place to live, a car to drive, food, clothes, books, movies, insurance, trips to conventions, and the computer. It’s what my mother earned in the fifties, while my father earned his living at the advertising agency. 

My day job is usually flexible. I can choose when to do what needs to be done, and I’m able to write when the time is best for me, and for as long as I want, my muse permitting. 

Like so many writers, I write part-time, but a writer is what I am. My day job is just what I do for a living.