Solstice Week

Solstice Week was a unique event in Pokémon GO that began on June 13, 2017. This event celebrated the upcoming in the Northern Hemisphere and  in the Southern Hemisphere.

Background
This event took place from June, 2017 through June , 2017.

To celebrate summer in the Northern Hemisphere and winter in the Southern Hemisphere, Fire-type and Ice-type Pokémon had increased spawns. Pokémon like Charmander, Cyndaquil, Growlithe, Houndour, Ponyta, Swinub, Vulpix, and their evolutions appeared more frequently. Rare Pokémon like Sneasel, Magmar, Cloyster, and other Fire and Ice types appeared as well.

Trainers received huge XP bonuses for successfully catching Pokémon with Nice, Great, and Excellent Throws, as well as Curveballs and First Throws. Hatching Eggs will also rewarded trainers with triple XP.

Lucky Eggs were 50% off in the in-game shop.

Trivia

 * This event was leaked ten days early through Team Eeveelution, the same ones who confirmed the Water Festival.
 * An Italian and Chinese translation of the event's announcement stated that Gyms will be disabled starting on the of June.
 * Curveballs will reward triple XP.
 * The event was extended an extra day due to issues with the PTC account login.