One could get a headache from all this.
How I see it…Dick should’ve been Robin for at least 7 years.
Age: 12 – Becomes the ward of Bruce Wayne [Age 25 and in his third year as Batman].
Age: 13 – After a year of training becomes Robin.
Age: 14 – Meets Wally & Garth when fighting Mr. Twister. Later meets Donna and then Roy to form the original Teen Titans.
Age: 15 – Fighting crime with Batman and the Teen Titans. Batgirl debuts (18 year old Barbara Gordon).
Age: 16 – Second year with the Teen Titans. Mal Duncan and Lilith Clay are introduced.
Age: 17 – Third year with the Teen Titans. Titans West introduced.
Age: 18 – The Teen Titans disband.
Age: 19 – Dick helps form the New Teen Titans.
Age: 20 – Retires from Robin and becomes Nightwing. Jason Todd (age 15) becomes the new Robin
Age: 21 – Jason Todd dies.
Age: 22 – Graduates from college. Tim Drake (age 14) becomes the third Robin
Age: 23 – Current age of Dick Grayson. However, in regards to Rebirth, Dick should be a teenager again.