My first was around 8:00 pm. My second was scheduled for early afternoon but she was impatient and it was actually around 10:00 pm, a few days earlier than scheduled.
I can't imagine why it would be a problem to have scheduled c-sections occur during business hours. OB's work around the clock, have long office hours, deliver babies at all hours, any day of the week. If a doctor plans all of her scheduled c-sections for Thursdays between 8:00 am and 5:00 pm, more power to her. They deserve to have some semblance of free time. I would imagine that if you did a survey of delivery times for SCHEDULED c-sections, votes would be fairly high for early in the day...and rightly so.
ETA: I only voted once since both have the same answer. Add an extra vote for me in the 6:00 pm or later column