If I have previous service time with the State of Illinois, can I get credit for this? Yes, prior qualifying State of Illinois employment may be verified and would then be used to determine the level at which an employee earns or is granted vacation benefits based on appointment type. Do SIU School of Medicine employees receive the same holidays that State of Illinois employees receive? No. SIU School of Medicine employees receive thirteen paid holidays each calendar year. The university recognizes six designated holidays: Independence Day, Labor Day, Thanksgiving Day, Christmas Day, New Year