In 2019, Pokémon GO introduced the concept of Hatch Days. These are days where, for three hours, a certain event exclusive piece of Field Research will be available for players. This research is then forever with the player. Each region has the event at different times. Click the Hatch Day for more details

Picture	Name	Duration	Focus
	Azurill Day	September 30th 2023	Azurill
	Riolu Day	July 2023	Riolu