American University in Washington D.C. typically operates on a semester system with intakes in Fall (August) and Spring (January). Some programs may offer Summer (May) enrollment. Application deadlines vary by program and degree level.
For undergraduate programs, Early Decision I is usually November 15, Early Decision II around January 15, and Regular Decision by January 15. Graduate deadlines differ by department but often fall between December and March for Fall admission. Check the university’s official website or contact the admissions office for program-specific dates, as some may have rolling admissions or earlier deadlines for scholarships or assistantships.