I once wrote a macro program to calculate days between dates. This is a common sort of routine that wasn't really needed in my application, but for a sort joking encouragement to myself to work harder (it ran every time the program started). I called it MOZART and when it ran, it compared the day's date to my birthday, reported the difference in days and years, and told me that when Mozart was my age, he had been dead for 11 years (or whatever).
I hadn't looked at this macro in years, but I ran it the other day and noticed that today would be somewhat special. Yes, today I am 20,000 days old. I have experienced 20,000 spins of the Earth (and well over 54 trips around the sun). Whoopee!
If you want to find similar fascinating facts for yourself, you can try this or many other date calculation sites.