It was to become the most memorable moment of US VP Quayle's term in office...

Whilst visiting a school in Trenton, New Jersey, he told a student that "potato" should be spelled "potatoe" on this day.

It was set out in the Oregon Treaty between Great Britain and the United States.

The treaty established the 49th parallel from the Rocky Mountains to the Strait of Georgia as the boundary between the United States and British Canada.