I am retired, so I can quilt anytime. I actually find myself waking up real early for me (4:30-5:30) and spending about an hour or so in my sewing room, or in front of TV, handquilting. Then I go back to bed until about 8:00-8:30. I do sewing and planning and comuter time during the day.
So I guess "anytime" would be the answer.