What are the Business Service Center hours of operation? Natasha Updated April 01, 2026 20:55 Follow Hours of Operation:Sunday, May 17: 8:30 a.m.–6 p.m.Monday, May 18: 7 a.m.–6 p.m.Tuesday, May 19: 7 a.m.–6 p.m.Wednesday, May 20: 7 a.m.–1 p.m. Related articles What is ATD’s attendance policy, and what should I do if I need to miss time from my program? What are your shipping methods and rates? What’s included with my registration? Where is the Business Service Center located? Is there a student discount?