Niantic has announced that Duskull will be the October 2021 Community Day featured Pokémon. The event will take place on Saturday, October 9th, 2021, from 11:00 a.m. to 5:00 p.m. local time.

October Community Day: Duskull, the Requiem Pokémon, will be featured!

Trainers, We’re excited to announce that Duskull, the Requiem Pokémon, will be featured during October’s Community Day event!

Date + Time
Saturday, October 9, 2021, from 11:00 a.m. to 5:00 p.m. local time

Features

• Duskull will be appearing more frequently in the wild! If you’re lucky, you might encounter a Shiny one!
• Evolve Dusclops (Duskull’s Evolution) during the event or up to two hours afterward to get a Dusknoir that knows the Charged Attack Shadow Ball.
• To help you evolve your Dusclops into Dusknoir, you’ll be able to earn up to four Sinnoh Stones by completing free Timed Research during Duskull Community Day.
• 30 Ultra Balls will be available in the shop at no cost. Be sure to pick them up during the event!
• Take a few snapshots during Community Day for a surprise!
• There’ll be a special one-time-purchase Community Day Box available for 1,280 PokéCoins, featuring 50 Ultra Balls, four Incense, four Star Pieces, and an Elite Charged TM.
• For US$1.00 (or the equivalent pricing tier in your local currency), you’ll be able to access the Duskull Community Day–exclusive Special Research story, Nothin' Dull About Duskull.
• Stay tuned for when tickets for the Nothin' Dull About Duskull Special Research story go live! Tickets are nonrefundable (subject to applicable law and the exceptions set forth in the Terms of Service). Please note that this Special Research will not include an in-game medal.

Bonuses

• 3× Catch Stardust
• Incense activated during the event will last for three hours
• Lure Modules activated during the event will last for three hours

Please be aware of your surroundings and follow guidelines from local health authorities when playing Pokémon GO. Upcoming events are subject to change.

Source: https://pokemongolive.com/post/communityday-oct21/?hl=en