Students are not permitted to enter the United States earlier than 30 days before the start date of their program. If you wish to enter earlier than 30 days before your start date, you must qualify for a visitor (B) visa. U.S. Customs and Border Protection (CBP) officials may admit you to the United States on the visitor (B) visa, but you must apply to U.S. Citizenship and Immigration Services (USCIS) for a change of status to student (F-1or M-1) status. You may not begin your course of study until the change of status is approved, and you may encounter lengthy processing times.