When / How do they schedule C-sections?

Nay • Mrs. | Mother | Soldier US Army | Mommy 2 under 2 *

Do they wait until like a week before? Or do they let you choose the day that works for you? Or do they randomly call you like “We have an opening for XXX?”

Just trying to get an understanding of what my expectations should be, I know it’s by availability but still do you have say so’s at all..