Pokémon Go is having an event that starts tomorrow, May 18th at 1 PM PDT and lasts through the following Thursday, May 25th at 1PM PDT. This event, Adventure Week, will up the encounter rate for Rock-type Pokémon, give you more items at PokéStops, cut the distance required for candy for your Buddy Pokémon, and give you the Adventurer’s Hat for your avatar to wear.