When will I know I'm accepted or not?

Today,my app tracker’s status was change to that “January 21, 2015: We have forwarded your application to the college for review. Review of fall applications begins in January and decisions are sent on a rolling basis beginning in February. If you have applied for spring semester, you can expect to receive a decision within the next four weeks.” could anyone tells me how much time, which processing usually will be taking ? by the way, i am an international studnet, appling as a transfer student.