Thank you!
The shift cards come into play after the first round (so halfway through the game).
Splendid!!
So.. After first year? Once per game? I.e. after two rounds.. :)?
The game consists of two rounds. Each round consists of every player taking one turn. At the end of the first round, everyone draws a shift card. The rules also describe "rounds" as "years," so yeah, you could also say you draw a shift card at the end of the first year.
I hope that makes sense!