Taki Chuunin Exam
Konoha Chuunin Exam
In this series, my main OC Tetsuki accidentally helps Naruto graduate one year early, leading to the both of them and another OC, Komadori Ouba, becoming a genin team under Kakashi.
They end up taking the first Chuunin Exam which, because it’s a year earlier than canon, is not in Konoha but in Waterfall (following the logic of Dreaming of Sunshine that the Chuunin Exams would alternate between big villages and small villages so that old hostilities don’t prevent advancement for more than a year).
The Konoha Chuunin Exam is just a really good marker of time–since it’s not as if their team has changed Orochimaru and Sand’s plans, so the invasion is still on–and then ambiguous Shippuden point in time just to round it out.
edit: Komadori’s Shippuden strength corrected.