It's up to you guys. The genin usually start off at around age 12 and the Chuunin Exams are supposed to happen twice a year so we have to explain why they missed it for three years.

Edit: 

[quote=@Arista]
Fair enough, so should we do my idea? We're doing final training a few days before the match ups? Or anyone have anything else? [@ViolentViolet] [@King Kindred]
[/quote]

The final training sounds good.