The humanoid goose
Four times 10 and add one, that makes forty-one. 50 minus 9 also equals 41. And eight times six minus seven, that's probably 41 too. Forty-one years is definitely more than 80 percent of half a century. That's pretty much an aeon! Yet it's only 0,000000133425638th of a lightyear. Still that's a whopping 350.640 hours of existence. I could've walked 1.753.200 kilometers in that time.
Yep, you guessed it! It's my birthday today...