If your exam date is supposed to be 8th June but your admit card shows 25th May, there might be a confusion due to either rescheduling or multiple exam phases. Sometimes, exams are conducted on different dates for different regions, shifts, or groups. It's also possible that the official website was updated, or that you applied for more than one post/exam. Please double-check the official website or notification of the specific exam. If you're still unsure, contact the conducting authority immediately to avoid missing your correct exam date. Do not rely only on previous assumptions—always follow the admit card instructions.