The featured Pokémon for February Community Day is…
Don’t forget! During Community Day, you can evolve Rhyhorn into Rhyperior for the exclusive attack Rock Wrecker. And if you’re lucky, you might encounter a Shiny Rhyhorn! This means that Shiny Rhydon and Shiny Rhyperior will also make their debuts.
The Community Day featuring the winning Pokémon will take place on Saturday, February 22, 2020. The featured bonus will be 3× Catch Stardust. Per an earlier update, Community Day for Trainers in the northern hemisphere will run from 11:00 a.m. to 2:00 p.m. local time, while in the southern hemisphere, it will run from 3:00 p.m. to 6:00 p.m. local time.
From Saturday, February 22, at 12 a.m. to Saturday, February 22, 2020 at 11:59 p.m. local time, you’ll be able to earn two Sinnoh Stones per set of regular- or premium- track #GOBattle League battles completed, regardless of whether you win or lose.
Source: Official Pokémon GO blog