It depends on a few things. Sometimes they like to space exams out, so that you have time between assessments if it's likely people are taking a 'block' of subjects. For instance, developmental psychology and biological psychology aren't likely to be one day after the other in the exam period because most people will take both in a package. Similarly, if your subject has an assignment due at the beginning of the exam period, close to SWOTVAC, it's likely that the exam will be further away (I think it's Globalisation or Linguistics which has this happen - an assignment due at the beginning of the period and quite a large gap between the due date for that and the exam).
Then you have to consider that there are a certain number of exams which require a 3 hour period, and a certain number which require a 1.5 and you can only fit so many people into the REB/Wilson Hall/wherever at once, so the scheduling of one exam impacts another.
And thirdly, and one I have been told by several lecturers tends to impact a lot, is the size of the subject. Obviously if more people are taking a subject it takes longer to mark - especially if there are written responses involved. So smaller cohorts tend to be placed towards the end of the exam period (for instance, Australian Politics with 120 students was on the last day last year) and larger subjects tend to be towards the beginning, because everyone's results have to come out at the same time (or by the same date).
But there's really no way to know until they release the timetable, and I'm not sure of the exact dates. My advice would be: don't plan anything yet.
Correct me if I'm wrong, admin freaks!