A normal human spine has 33 vertebrae when the bones that form the coccyx are counted individually.
There are 33 degrees in the rite of freemasonry.
Jesus was 33 when he died.
A hobbit comes of age on their 33rd birthday.
Here is some Stevie Nicks to listen to while you think about that:
Happy birthday, honey. You are now a come-of-age hobbit. I love you!
This was the 33rd one of these.