Pokémon GO is officially starting its first event of 2017 with a Valentine's Day celebration. The event is due to start at 11:00 AM PST, and will last until February 15th.
This is bringing an increase in the amount of candy that you'll receive from all sources, a six-hour duration on all lures, and an increase in finding 'pink' Pokémon (such as Chansey, Clefairy, and Jigglypuff).
Additionally, the new baby-Pokémon that were released late last year will again have an increased chance to be hatched from eggs for the duration of the event.
From the official announcement:
Trainers,
With Valentine’s Day just around the corner, we couldn’t think of a sweeter time to double the amount of Candy you’ll earn every time you catch, hatch, and transfer Pokémon. Your Buddy Pokémon is also getting into the Valentine’s Day spirit and will find Candy twice as fast!
Throughout the celebration, you’ll notice that Chansey, Clefable, and many other adorable pink Pokémon will be encountered more frequently in the wild. Cleffa, Igglybuff, and Smoochum will also be more likely to hatch from Eggs. And to help you paint your town pink this Valentine’s Day, Lure Modules will last for six hours for the entire duration of the event.
This limited-time celebration will only be available from 11:00 A.M. PST on February 8, 2017, to 11:00 A.M. PST on February 15, 2017, so grab your valentine, get out, and explore the world around you!
—The Pokémon GO team