Congratualtions on the 40 years. What a fun way to spend the day.:)
My brother in law had no money but wanted to do something special for his wife for their 40th. So he dressed up just the way he did for their first date, borrowed a car just like the one he used to own and showed up at my MIL's house where she was having lunch. Boy was she surprised. I think it was a hit. Of course we were all in on it and took lots of pics.