Adventure Week 2017

Adventure Week in 2017 was the first Adventure Week event in Pokémon GO.

Features
During this event, more items were awarded from every PokéStop, and Poké Balls were 50% off in the in-game Shop.

Featured Pokémon
Rock-type Pokémon, known in the player community as the "Fossil Pokémon", would have increased spawn rates in the wild (and from Incense, Lure Module).

Avatar items
These avatar items would be released with the beginning of the event:

Trivia

 * Niantic mentioned few statistics:
 * Back in December, 2016, Trainers collectively walked past the equivalent distance of Earth to Pluto.
 * As of May, 2017, the Pokémon GO community has traveled more than 15.8 billion kilometers.