I absolutely agree, another one on my long list of reasons why I shoudnt give s8 anymore of my money. Too bad, I like the grafics of the game. But these short time goals makes the overall achievement more difficult for some = unfair. I placed all the needed buildings (except gem tree) but because of the time issue, this is one event thats not going to work for me :-( sigh.
S8: not very considerate of you!