Niantic has announced further details about Pokémon GO events that will take place around the world during July, August and September of 2017. The Chicago event was previously announced during the First Anniversary of Pokémon GO press release.

Pokémon GO events around the world!

Trainers, Over the next few months, we'll be hosting a number of events taking place around the world in celebration of Pokémon GO's one year anniversary. No matter where you live, you're invited to join in the fun!

Pokémon GO Fest Chicago

Pokémon GO Fest (Saturday, July 22 taking place in Grant Park, Chicago, IL) is fast approaching, and we hope you’re all as excited as we are. We wanted to share some details about how Pokémon GO Trainers everywhere can participate in a global challenge with Trainers at the event to unlock special rewards worldwide.

During the day, there will be three Challenge Windows in which Trainers everywhere will work alongside those in Chicago to unlock global rewards. During the Challenge Windows, Trainers in Grant Park will attempt to unlock perks for Pokémon GO players around the world by catching certain types of Pokémon. Each Pokémon- type will be tied to a different perk, so Trainers at the park will need to carefully choose which Pokémon they catch. Will those in attendance try to catch Electric-type Pokémon to reduce the distance required to hatch Eggs, or Grass-type Pokémon to increase Stardust bonuses, or other Pokémon- types to secure a variety of other bonuses? Join in the action and find out!

Meanwhile, Trainers outside of Chicago will attempt to catch as many Pokémon as possible during the Challenge Windows to extend the duration of the bonuses unlocked by those attending the event. If Trainers around the world catch enough Pokémon, a mystery challenge will be unveiled in Grant Park that, once completed, will unlock an extra-special bonus across the globe. Trainers everywhere will want to grab their friends and family to help make this the biggest celebration in Pokémon GO’s history!

Pokémon GO Safari Zone Events in Europe

We’re excited to announce that a variety of Pokémon GO Safari Zone events will be taking place at select Unibail-Rodamco shopping centers during August and September!

 August 5, 2017
 Fisketorvet—Copenhagen, Denmark
 Centrum Cerny Most—Prague, Czech Republic

 August 12, 2017
 Mall of Scandinavia—Stockholm, Sweden
 Stadshart Amstelveen—Amstelveen, The Netherlands

 September 16, 2017
 CentrO—Oberhausen, Germany
 Les Quatre Temps—Paris, France
 La Maquinista—Barcelona, Spain

All seven Pokémon GO Safari Zone events will give Trainers the opportunity to catch a wide variety of Pokémon in special zones featuring Pokémon originally encountered in the Kanto and Johto regions, including some Pokémon never before encountered in Europe! Additionally, Trainers in attendance will join forces to take on unique and powerful Raid Bosses that will be making appearances at these events.

Pikachu Outbreak in Japan

The Pokémon Company will be hosting its annual Pikachu Outbreak event in Yokohama, Japan, from August 9–15, where a special Pokémon GO experience is taking place. More information about Pikachu Outbreak will be unveiled by The Pokémon Company in the coming days, so stay tuned for all the exciting details!

Source: http://pokemongo.nianticlabs.com/en/post/gosummerevents