A new season titled Memories in Motion is coming to Pokemon GO from March 3 to June 2, bringing several notable changes to how events roll out. The season will introduce updates to event scheduling and structure, fresh Daily Discovery experiences and even evolved Shiny Pokémon appearing in the wild. Players can also dive into a new Special Research story called Pressure Rising, adding more narrative driven objectives to complete. With a mix of quality of life updates and new content, Memories in Motion looks set to shake up the usual routine for Trainers this spring.
Source: Official Pokémon GO blog