When was Morrie from "Tuesdays with Morrie" diagnosed with ALS, and how long did he have to live?

From the text:

Finally, on a hot, humid day in August 1994, Morrie and his wife, Charlotte, went to the neurologist’s office, and he asked them to sit before he broke the news: Morrie had amyotrophic lateral sclerosis (ALS), Lou Gehrig’s disease, a brutal, unforgiving illness of the neurological system.

Morrie’s doctors guessed he had two years left. Morrie knew it was less.