Adventure Week

The Adventure Week was a unique event in Pokémon GO that happened in the middle of May, 2017.

Features
During this event, there were more items were awarded from every PokéStop, and Poké Balls were 50% off in the in-game Shop. Buddy Pokémon found Candies four times as fast for the duration of the celebration. Additionally, an all-new avatar item became available in the wardrobe &mdash; the Explorer's Hat.

Following Rock-type Pokémon, known in player community as the "Fossil Pokémon" had increased spawnrate in the wild.

Trivia

 * Back in December, trainers collectively walked past the equivalent distance of Earth to Pluto.
 * As of May 11, the Pokémon GO community has traveled more than 15.8 billion kilometers.