I hate having the phone ring any time during the evening. Basically, I hate the telphone. Period. But evening calls are worse, especially when it's DH's co-workers calling "with a quick question." Work hours are 8 - 6, leave him alone after that.
If I absolutely HAVE to call someone in the evening, I would do so until 9 p.m. And I won't call anyone in the morning before 9 a.m. unless I know specifically that they are earlier risers, then I'll call after 8 a.m.
DH's brother-in-law and co-workers have called before 7 a.m. and I really, really hate that. Occasionally they've woken us up, and they should just be glad I refuse to answer the phone that early or they would get an earfull.