My brother and I, we are completely insane.
Instead, like normal people, simply enjoying Thranduil's dramatic conversation with Thorin in the Hobbit Movies, we just have to complicate things.
Sooo... If 100 years are a mere blink of an Eye in the Life if an Elf, then how old is said Elf??
After all 100 years would be 0.01 percent of a 10000 years old Elf.

Sooo, we did a bit of math... (we are aware of our being in the Summer Holidays)

So yeah, unless we made any mistakes, Thranduil would have to be older than the universe.

Pretty old that guy, eh?