Community Day

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

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

Trivia

 * Fast TMs and Charged TMs will not grant exclusive moves during Community Day.
 * To learn the exclusive move, the featured Pokémon must be captured or evolved during the event.
 * The January 2018 event did allow Charged TMs to grant any previously captured Pikachu Surf.
 * During each Community Day, there is increased chance of encountering shiny form of featured Pokémon.