I'm 79, and have complex partial seizures.
I took this question as survival age. My aunt is in her 70’s now but has been epileptic her entire life.
I am only 67 and have had it all my life, with it getting worse, but in much better shape than most people that are just a small fraction my age.
I believe that you can probably be diagnosed with epilepsy at any point in your life because if you are delt with a life changing event that you might be diagnostic you with epilepsy