Although the Quidditch World Cup is said to be held every four years, what happened in 1877 is a mystery and it is known as “The Tournament that Nobody Remembers” (Pm).
Quidditch World Cup tournaments take place over several months, with the final match falling in July (as in 2014, Pm) or August (as in 1994, GF8).
Type of Event Wizarding world
Whatever caused the tournament to disappear from everyone's memory, it left behind several mysterious injuries and relocations.
From the Web
Writing by J.K. Rowling on Pottermore:
Pottermore enhanced reading experience: Quidditch World Cup
Screenshots of the original Daily Prophet coverage of the 2014 Quidditch World Cup on Pottermore: Imgur archive