[RCW1945]

The producers decided to celebrate the 518th birthday of Henry VIII.
Two strange things about this:
1. He had a birthday every year since;
2. 518 is hardly a round number.
However, Wednesday was the 500th anniversary of his coronation, a once-in-a-lifetime event and a very round number.
Did they reckon the HMs were insufficiently intelligent to understand the concept of "coronation"?