Well, I'm kind of what you would call backwards. I WANT night time calving. Hubby works full time job, so if I have a problem (which is sooo rare) I prefer them to calve at night with him home. He does miss any sleep unless I have to get him up - VERY good sleeper.
He purchased me a camera for Xmas several years ago & we've added 3 more. Receiver handles 4, wireless within 100 feet. I just lay in bed & watch. Never go out unless I think there's a problem.
I fully understand the feeding time for daytime calving. My "close-up" group (within maybe 10-14 days due) has full time baleage, and when they appear "ready", they are put in the barn before dark & turned back out early AM - if no sign of going into labor. In the barn, they only get a flake of hay for the night.
Actually, most of my calves are born in the evening - which is perfect - but during night is just fine with me.