Now one can choose the exam day of their choice. You can choose any day before 60-90 days. But somehow if you are not able to attend the test on that particular day then you can reschedule it. All you need to visit the Prometric website and follow the instructions. Thereafter, you need to choose the next date for the examination. One must keep in mind, that you will have to pay an extra fee to the Prometric for the rescheduling process.