Guys tend to have normal working hours (such as 8am-5pm) and assume ladies are up and at 'em at the crack of dawn as well.

But for me, I tend to wake up around 10am and get to bed around 3am.  So a phone call before 10am to me is just CRAZY!!  

Thats not to say some other ladies are not early birds.... They could be up early already to get the kids to school, for example, but I tend to keep stripper's hours.  

As the other lady mentioned, trying to set something up on the same day is tough due to screening, but it doesn't hurt to try.

and voice-mail would kick in when calling early.  (I get to work at 7 every day.)  I have been surprised once or twice to have the phone answered by a groggy (and pissed) voice, so I don't do it any more.

....MOST ladies for one reason or the other start their days around 9AM  BUT if you're worried and she doesn't list a time frame to call in on her ads or website you should email her maybe the day before so you don't need to worry when it's too early to call.

I never do last minute appointments. However I would assume for the providers and hobbyists that use phone calls as their main contact, that if someone doesn't want to get calls at a certain time they would turn off their ringer and let voicemail pickup. Is that so hard??

"but that doesn't always pan out some will cancel."

If you choose wisely, it should not happen to you that much.

Maybe send a text vs. calling. The ladies I know have separate hobby phones. They are also smart enough to turn them off when they don't want to take a call.