Originally Posted by
Henry III
Thus, I would imagine that any sort of retro claim would carry the date of the original flight(s).
My experiences are the same; retro-claimed flights are added to your FB account retro-actively for the date on which the flight took place. Therefore I doubt your ingenious plan would work; but feel free to try it, if you don't need the segments / miles this year. Just don't forget to let us know if it actually worked.