I like your idea, but then I will only be 15 years old on my next birthday!
My friend, who rides 40 miles per day on the same exact route, every single day, just did 68 miles on his 68th birthday - well he tried, but had a flat, and as he carries no tire repairing equipment, didn't make it. So he tried it the next week, and guess what - another flat, and again no tire repairing equipment. I lent him a tube after he borrowed a patch and the tire blew out on a pinch flat as he was inflating it, and he made it. Why no tire repairing equipment? Well, he is just sort of a strange guy!
You should have no problem with the 65 miles after 4 months. Just a metric century. I did 100 miles after four months at age 58.
Sometimes on November 7th around here it is a bit snowy! May not make that.