I think gold and silvr take place three years after the original. For the other two, theres really no way to tell.
Chicago and its suburbs.
greece
Before the Civil War
On the Mississippi .
Before the Civil War
Usally the adventures of Spider-Man take place in modern day New York City, New York.
johto
Kirrin bay (scotland)
The UNOVA Region
It's a Pokemon event. you have to wait. when will this event take place.
the Pokemon center in Vermillion City
You need an arceus.