A friend called me at 7:00 on a Saturday. She assumed that since I have kids that we would all be up by then. 
I wouldn't call anyone before 9. If it's something important and I need to catch them before they leave for work or school perhaps I could justify calling earlier.
Once I called my neighbor at 6:45. Her husband put their puppy outside when he went to work and it had been barking for almost 45 mins at their back door. I was trying to be polite and assume that she was asleep and didn't know. When I called to inform her the dog was left outside and barking, she replied "yeah, I know. It's really annoying."

I wouldn't call anyone before 9. If it's something important and I need to catch them before they leave for work or school perhaps I could justify calling earlier.
Once I called my neighbor at 6:45. Her husband put their puppy outside when he went to work and it had been barking for almost 45 mins at their back door. I was trying to be polite and assume that she was asleep and didn't know. When I called to inform her the dog was left outside and barking, she replied "yeah, I know. It's really annoying."
