>In the TaskList tool there is a Timestamp column. Is anyone aware as to how this timestamp is created?

I think it's a converted value from the sys(2015) value in the first column. ISTR there's a function on the fox wiki which does the conversion. It's a day number (based on year(date()) % 100) plus milliseconds or something like that.

It's been years since I was last messing with that.