As I understand if you've worked for a company for many years you can request a number of weeks off as unpaid leave. This is sometimes referef to as Special Leave, Lifestyle Leave. Other "flavours" also exist called Dependants Leave. etc.which can be for upto 18 weeks per child.
Question I have - can you work for another comopany during this time. E.g if you take 18 weeks off, can you get a temp xmas job coveing 8 weeks?
Therefroe take unpaid leave from company, spend 10 weeks with the kid, take temp job for 8 weeks, then return back to "normal" work?
It's a complex situation, but that's the gist of it.