For 2017s Edge specifies 1998 birth year. In the US 2017s would be late 1998 and 1999s, depending on school enrollment cut offs.
The 2019 is the most shocking as they specify they want 9th graders ( 2018s ) and talented 8th graders, and will compete at u15 tourneys. With the exception of nationals i15 typically preclude high school players. | 
