Firstly let me assure you that I am fully aware that it's nigh on impossible to fall pregnant exactly when you choose, however is there a best time for me to try? 
Let me expand;
I would take 12 months maternity (some of this may be holidays towards the end)
My works holiday year runs Jan - Dec, I get 4 weeks hols.
When "ideally" should baby be born to maximise time off and minimise lack of pay!?
I'm not keen on a winter baby, spring would be ok however people tell me that's bad for schooling as they'd be left behind (not sure how that works!) 
September is crazy busy with birthdays and anniversaries but August or October would be do-able. Really don't want to spend December in labour either!
So, given all that, when should I aim to give birth! Again I am perfectly aware that just because I have a plan doesn't mean it will go smoothly!