Adventure Week

The Adventure Week is an event in Pokémon GO that occurs in the late May or early June.

2017 Event
Adventure Week in 2017 was one week long, as it happened between May and May.

Features
During this event, 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.

The following Rock-type Pokémon, known in the player community as the "Fossil Pokémon" had increased spawn-rate in the wild.

2018 Event
Adventure Week in 2018 lasted for over almost two weeks, between May and June, 2018.

Features
Similarly to the last year Adventure Week, there were few of the same perks available for trainer during the event &mdash; more items were awarded from every PokéStop and Buddy Pokémon found Candies four times as fast for the duration of the event.

Featured Pokémon
Unlike previous year event, not only members of "Fossil Pokémon" had increased spawn rate in the wild as it applied also to some other Rock-type Pokémon.

The following Raid Bosses are available for a limited time during this event.

Moreover, these Shiny Pokémon were released with the start of the event.

Shop special offer
The following offers were available from the Shop.

Field Research event tasks
There was several of Field Research tasks exclusively available only for the time of Adventure Week in 2018.

2019 Event
Adventure Week lasted from June to June, 2019.

Features

 * Earn 4× Buddy Candy
 * Visiting new PokéStops awards 10× XP
 * Trainers who have Adventure Sync activated and walk 50 km will earn 50,000 Stardust and 15 Rare Candies, the rewards will be given on June and June.

Featured Pokémon
Rock-type Pokémon appeared more frequently in the wild.

Spawn rates for Rock-type region-exclusive Pokémon were also increased in their regions.

2-km Eggs obtained during the event were more likely hatch Rock-type Pokémon in addition to the regular hatching pool prior the event.

Moreover, these Shiny Pokémon were released with the start of the event.

The following Raid Bosses were available for a limited time during this event.

Field Research event tasks
There were several Field Research tasks available exclusively for the duration of the event.

Trivia

 * In 2017 event announcement, 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.
 * The 2018 Omanyte research was previously "Hatch 3 Eggs", but it was changed days later.