I have won twice from Wonderlist and both times they phoned around 10-11 am. Each time I wasn't expecting (or hoping) for their phone call and was surprised. I always answer my phone. No way I want to miss a contest win.
However I also figured they would leave a voice message if the answering machine picked up while I was out. I'm not impressed to read they might just phone a different person if you are not home. I'm going to make up a sticky note with their contest end dates now and put it on my monitor.