In the Goblet Of Fire film, Cornelius welcomes everyone to the 422nd Quidditch World Cup. According to http://harrypotter.wikia.com/wiki/Quidditch_World_Cup, the first Quidditch World Cup was in 1473 and the tournament itself is held every four years.
So if the first one was in the year 1473 and it is held every 4 years, the 422nd World Cup would be in the year 3157, and NOT the year 1994 as it claims to be.
Now I am, by my own admission, a Harry Potter amateur. Am I missing something with this? Is there an alternative Wizarding date system that the films completely bypass?