Niantic has announced the Festival of Lights event for event for Pokémon GO coming in November 2021 as well as all ther other events during that month.

Coming in November: Festival of Lights and more!

November Research Breakthrough encounters
Monday, November 1, 2021, at 1:00 p.m. PDT (GMT −7) to Wednesday, December 1, 2021, at 1:00 p.m. PST (GMT −8): Vullaby

Raid Pass Icon Weekly 1 PokéCoin bundles
Every Monday in November, a one-time-purchase bundle containing a Remote Raid Pass and other items will be available in the shop for 1 PokéCoin.

Featured Pokémon in raids
The following Pokémon will be appearing in raids throughout November. Please note: Raid rotations all start and end at 10:00 a.m. local time on the dates listed.

Five-Star Egg Five-Star Raids Until Friday, November 5, 2021: The Mythical Pokémon Darkrai ★
Friday, November 5, 2021 to Tuesday, November 16, 2021: Cobalion ★, Terrakion ★, Virizion ★
Tuesday, November 16, 2021 to Wednesday, December 1, 2021: Cresselia

★: If you’re lucky, you might encounter a Shiny Darkrai!
* Darkrai caught during this period will know the attack Sludge Bomb
** Cobalion, Terrakion, and Virizion caught during this period will know the Attack Sacred Sword.

Mega Raids
Please note: Raid rotations all start and end at 10:00 a.m. local time on the dates listed.

Until Friday, November 5, 2021: Mega Absol ★
Friday, November 5, 2021 to Tuesday, November 16, 2021: Mega Manectric ★
Tuesday, November 16, 2021 to Wednesday, December 1, 2021: Mega Lopunny ★

★: If you’re lucky, you might encounter a Shiny one!

Raid Hours
Every Wednesday in November, a Raid Hour event will occur from 6:00 p.m. to 7:00 p.m. local time. The following Pokémon will be featured.

Darkrai: November 3: The Mythical Pokémon Darkrai ★
November 10: Cobalion ★, Terrakion ★, and Virizion ★
November 17 + November 24: Cresselia ★
★: If you’re lucky, you might encounter a Shiny one!

Pokémon Spotlight Hours
In the month of November, Pokémon Spotlight Hour will take place every Tuesday from 6:00 p.m. to 7:00 p.m. local time, and each will spotlight a different Pokémon and a special bonus!

November 2: Cacnea | 2× Catch Candy
November 9: Chinchou ★ | 2× Transfer Candy
November 16: Turtwig ★ | 2× Catch Stardust
November 23: Chimchar ★ | 2× Catch XP
November 30: Piplup ★ | 2× Catch Candy

November Community Day
Join us on Sunday, November 21, 2021, from 11:00 a.m. to 5:00 p.m. local time for a Community Day event featuring Shinx, the Flash Pokémon! Shinx will be appearing more frequently in the wild.

Evolve Luxio (Shinx’s Evolution) during the event or up to two hours afterward to get a Luxray that knows the Charged Attack Psychic Fangs.

For more details, check out the November Community Day blog.

Upcoming events
Stay tuned for details about these upcoming events.

• Festival of Lights: From ​​November 5, 2021, to November 14, 2021, it’s time to celebrate light overcoming darkness with an all-new event!
• Día de Muertos: From November 1, 2021, to November 2, 2021, we will be celebrating the Día de Muertos with a special event for Trainers around the world.
• Brilliant Diamond and Shining Pearl Celebration Event: Celebrate the launch of Pokémon Brilliant Diamond and Pokémon Shining Pearl with a special event from November 16, 2021, to November 21, 2021.
• ???: The Season of Mischief will close out with an epic event! From November 26, 2021, to November 29, 2021, Trainers who completed the Misunderstood Mischief Special Research story will be able to unlock a Special Research story where Trainers will have an opportunity to learn more about Hoopa. Stay tuned!

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/nov-2021-events