When does the last session end so I know when to schedule my return flight? ATD KB Admin Updated May 12, 2017 02:24 Follow The closing keynote presentation ends at 4 p.m. on Wednesday, May 24. Related articles What airport should I fly into? How many attendees will be participating in the conference? What is the address of the convention center? How much is a taxi from the airport to the Georgia World Congress Center? What meals and breaks are included?