I draw whenever I have the time according to my RL schedule.
Mon- Fri I draw during dead lulls at my day job, and/or in the evening once I get home. I may draw for like 3 or 4 hours at night & usually shut it down at midnight so I can get up and go to work the next day.Some of those nights I may take the evening off coz A) need mental rest or B) need physical rest(resting my hands).
On the weekends I usually dont get started until after 3pm(I sleep a little later til noon & require AT LEAST 3 hrs after I wake up to get my mind adjusted- coffee helps as well). Those days I'll take breaks to do stuff like stretch, do laundry & other household chores, or go grocery shopping. Saturdays I usually dont quit until anywhere between 3-5AM; Sundays I wrap work up usually about midnight coz I have to work at the day gig on Monday. The only time I'll take a weekend day off is if I have a function to do(go to the movies, go to a convention) or I'm fatigued(mentally, physically) and need a break from drawing/doing comics altogether.