As Pokemon GO Fest 2021 fast approaches its opening day, Niantic has released more information about some fantastic events that will take place.July 18th is the official Raid Day of Pokemon GO Fest 2021, where from 10:00 a.m. to 6:00 p.m. local time, players will have the opportunity to battle and catch every Legendary Pokemon available in the mobile game.Here are the full details on Raid Day, as well as every Legendary Pokemon that will be featured as a Raid Boss during the event.We’re excited to announce that every Legendary Pokémon discovered in Pokémon GO so far will be appearing in raids on Day 2 of #PokemonGOFest2021! https://t.co/Y1Z86MnWij pic.twitter.com/H5VwWRLges— Pokémon GO (@PokemonGoApp) June 24, 2021Related: Pokemon GO Fest 2021: Complete guide for the music-themed eventHow will Pokemon GO Fest's Raid Day work?On July 18th at 10:00 a.m., Raid Day will begin in Pokemon GO. Every Legendary Pokemon in POGO will be featured as a five-star Raid Boss. There will be a total of four themed hours in rotation, where different Legendaries will be taking over raids.Wind HourThis hour will be in rotation from 10:00 a.m. - 11:00 a.m. and 2:00 p.m. - 3:00 p.m. local time. Raid Bosses will include:Ho-OhMewtwoLatiasLatiosAltered Forme GiratinaCresseliaVirizionTherian Forme TornadusFrost HourFrom 12:00 p.m. - 1:00 p.m. and 4:00 p.m. - 5:00 p.m., Frost Hour will be in effect. These Legendary Pokemon will be the focus:ArticunoLugiaSuicuneKyogrePalkiaKyuremRegiceLava HourLava Hour will feature from 11:00 a.m. - 12:00 p.m. and again from 3:00 p.m. - 4:00 p.m. Five-star raids will showcase these Pokemon:EnteiMoltresRegirockHeatranGroudonReshiramTerrakionYveltalTherian Forme LandorusThunder HourLast but certainly not least, Thunder Hour will run from 1:00 p.m. - 2:00 p.m. and 5:00 p.m. - 6:00 p.m. The last group of Legendary Pokemon to be highlighted in raids will include:RaikouZapdosRayquazaRegisteelDialgaTherian Forme ThundurusCobalionXerneasZekromWhile every player will be able to participate in these special raids during Pokemon GO Fest 2021, ticket-holders of the event will earn some special bonuses on Raid Day, like earning extra XP and receiving raid passes.Uxie, Mesprit, and Azelf will also be appearing in five-star raids in the regions that they normally appear in.Each Legendary Pokémon will all be appearing in one of four rotating groups.— Pokémon GO (@PokemonGoApp) June 24, 2021Also, read Pokemon GO: Best map trackers to use in 2021