No, it is not a typo! Students completing their degrees by the end of May 2019 will be conferred on June 2, meaning that's the date on the transcript and diploma. Students who completed their degrees August 2018, January 2019, and who will confer June 2, 2019, will be eligible to participate in the Commencement Ceremony in Boston, which will be held June 9th.

The Conferral and ceremony are NOT THE SAME DAY.