What's a good day for a play date?

This wasn't an issue until recently in my current post, but since one is now at school, it is something i have to think about!!!

I think play dates are important, because I believe it forms stronger friendships for the children, is good socially for the children to be children outside of school, and I believe it is good for parents/nannies to form friendships too!

There seems to be a general consensus in the class, that Friday's are the best night for a play dates, for obvious reasons that it's the end of the week, and it doesn't matter if they go to bed later, as there is no school in the morning.

I have to be honest, I don't enjoy play dates on Friday, because selfishly (and I admit it is selfish) I want to finish work on time, whether it's just to sit in my pjs with a glass of something or to get off for the weekend - at 19.20 I want to know my week is completed, but with a Friday play date I know that this is going to push bedtime later, which then means I finish slightly later!!

It is one of those things that I guess I have to just get on with, and accept the reality of a play date - after all surely next year when they're that bit older we can do it on a Thursday?!