Sometime at the end of November 2013 - I only remember the month as I thought what a lousy early Christmas "present" to get. But I refuse to allow my diagnosis date to have any significant place in my annual calendar, as while I have to live with diabetes and deal with it on a daily basis, I'm certainly not prepared to allow it that level of importance in my life.
May 1999. One week after my year 6 SATs whilst in holiday on Marmaris,Turkey. Officially worst holiday ever. I don't remember the date because by day two of the holiday I was pretty poorly.