Niantic has announced that round two of Professor Willow’s Global Challenge will take place from July 14th, 2018 until July 15th, 2018 and if all the goals are achieved, on Saturday, July 21st, 2018, Zapdos will be available in Raid Battles around the world for 3 hours.

Unlock Zapdos Day during Professor Willow’s Global Challenge!

Trainers, Are you ready for round two of Professor Willow’s Global Challenge? Starting July 14 through July 15, each area of the world will have to meet the challenge requirements during Pokémon GO Fest in Chicago, USA! If each area achieves its respective goals, Candy-related bonuses will unlock starting on July 16—including bonuses for catching Pokémon and participating in Raid Battles. Trainers can also unlock a bonus to reduce the distance needed to hatch Eggs!

If all goals are achieved, Trainers all over the globe will be able to receive up to five free Raid passes when they spin a Photo Disc at a Gym during Zapdos Day, featuring the Legendary Pokémon Zapdos. On Saturday, July 21, Zapdos will be exclusively available in Raid Battles around the world for a three-hour period. During that time, all Zapdos caught will know the Fast Attack Thundershock. You might even encounter a Shiny Zapdos!

As this summer’s exciting Global Challenge events continue, please remember to be respectful of other Trainers and of PokéStops, Gyms, and other locations while you’re out there adventuring!

See you out in the field, Trainers!

Source: https://pokemongolive.com/en/post/zapdosday2018jul/