I threw together a little 'calculator' in Excel, you put in the current year, a person's age today, and it tells you a few interesting things. Saved me from trying to think about it all "in my head" when I was trying to envision when an 80 year old (for example) graduated high school or was a young teen, etc. It's attached.

try it out ... OOPS, I found out that this Forum does not accept Excel files as a valid filetype. So, instead of attaching it here, I've put it on my DropBox:

https://dl.dropboxusercontent.com/u/17841074/Years%20and%20Age%20Calculator.xlsx

-Jim