OK, so it is spring still haha. Yes but you know - people don't go to the beach or the picnic early morning or late evening ;-) Don't wedding photography do it in mid afternoon cos that's what the clients want.
They are still eating their breakfast and their dinners.
It's your job as a professional to educate your clients. Let them know that if they want good photos outdoors, they're going to need to be done early in the morning, or late in the evening. If they care more about eating and sleeping than good photos, then do the photos in the afternoon. Just let them know that the light will be unflattering, and then do your best to get the best photos you can with what you have available.
My girlfriend does lots of portraits and wedding photos and always tells them this ahead of time. Some care enough to reschedule stuff and show up early or late in the day. Some don't, and seem to just want it done so they can say they did it, without really caring about the results. Some think they care, but then show up 2 hours late and don't realize that the sun waits for no one, and get upset that you have to reschedule the shoot (at additional cost) or give them unflattering photos (at additional cost because they're gonna pay you for your time whether it's spent waiting in a car or focusing a camera).
Ultimately, wedding and portrait photography is not for me. I'm not patient enough with people. But if it's your thing, then understand that good communication skills are more important than good photography skills to getting a successful photo shoot. You can meter the light like a master and frame the photo like a boss, but if you can't convince the model to show up on time and give a natural looking pose, you're not going to get good portrait photos.
