You can't say how that conversation played out. Was it done in in a Ludo reveal kind of way?

Person x, depression, suicide.

Or was it something like:

You have a friend called Rusty Lee

(Niamh nods, or looks up to recognise the name)

well this is going to happen.

That is completely open, and until Niamhs last breath there is a chance that could be true.

Dates are really easy to get round to cold readers. Firstly you have an instant 1 in 12 chance of being correct to begin with. If you're wrong then they will often change it.

Well that's when they first became ill, someone close to them died in that month - they're with them now everything is great.

It's all linguistics.