Happy (belated) Birthday!!
My husband's birthday is on the 21st, also. I knew yours was either on that day or near it. Next year I should be able to remember the exact date.
Yes, why not shoot for 100? Sounds like you are in a wonderful position with relatives living to (wow!) 104! I have a neighbor/friend who turned 100 last year. She's still sharp as a tack and it's so fun to talk to her.
Hope you enjoyed the DQ ice cream cake. They are SO tasty. I tell myself "just a few bites," but don't have to tell you that doesn't always work so well, LOL!