There are 4 zones.
It depends on the game. Most Sonic games have two acts in its zones, but some had three acts in its zones.
About 4 or 5 time zones span China
mongolia have 4 different time zones
There are 4 climate zones in the Andes Mountains.
There are 4 time zones in the continental US. Alaska and Hawaii each have their own time zone.
4
Sonic:6 Shadow:4
4
Zimbabwe has 4 different time zones because it's a small country.
4
4
6: Green Hill, Marble, Spring Yard, Labyrinth, Star Light, and Scrap Brain.