When Did Seventeen Debut Date. Seventeen’s debut ep 17 carat was released on may 29, 2015. The show concluded with the.
As 2016 rolled around, seventeen would earn their first music show win on show champion—almost a year after their debut—with pretty u off of their first full album love&letter released on april 25.outside of. Debut big plan is a reality series following the 13 members as they carry out missions in the final days leading up to their debut in may 2015.