Translation of quinquenal

Yesterday, I heard a very good example to explain my point: On their journey more than ten years ago, the presidential couple Mr. and Mrs. Clinton visited Egypt. They were welcomed by the president.
The trip included a lot of walking and the guide told us the history of this region, of the Chiapas state and also how it evolved in the context of the entire Mexican country. Very interesting!!!
By the way, Jeffrey and Brooke got married before the trip and this vacation was their honey moon. On the deck Jeffrey suddenly noticed that he had lost his wedding ring. It was probably in the bag.