Um, my relative is a feng shui master, so he did it for us.
I don't think it's possible to just choose the date, with no timing, cos each 2-hr time frame has a different 'impact'.
In addition, the master shld hv to take into consideration yr hubby's and yr 8-characters, as well as both your parents' chinese names and animal year, to arrive at best date and time.
By the way, you have to ask yr gynae between what date to what date can yr c-sec op be chosen. You can only play around with the date and time for that period.
Overall, it's quite a hassle, as well as additional cost. I would rather go for natural birth actually, just that I have no choice. In your case, if you can have a choice, maybe can re-think. But if you are in same sitn as me, then just spend, n get the best for your unborn child. That's what my hubby and I think at least...