Community Day

Community Day is a monthly worldwide event in Pokémon GO dedicated to celebrate players in the Pokémon GO community.

Features
Pokémon GO Community Day is an opportunity for Trainers around the world to meet up at their local parks to make new friends and experience what it means to be a part of this special community.

Once a month, Niantic hosts a Pokémon GO Community Day event starring a special Pokémon, which appears frequently around the world for just a few hours. When caught during the event, this special Pokémon will know an exclusive move. Other bonuses are in effect during the event, such as increased XP or Stardust, and Lure Modules activated during the event last for three hours.

Event hours
As the Community Day event lasts only for 3 hours, it doesn't occur at the same time globally, but during the noon in respective time zones.

Trivia

 * Fast TMs and Charged TMs don't grant exclusive moves during Community Day.
 * However, exclusively, during the first Community Day in January, 2018 Charged TMs could grant any previously captured Pikachu Surf.
 * To learn the exclusive move, the featured Pokémon must be captured or evolved during the event.
 * During each Community Day, there is increased chance of encountering shiny form of featured Pokémon.