The recently-announced Special Raid Weekend is now taking place for Pokémon GO players across the globe. Both the Psychic- and Flying-type Legendary Pokémon Lugia and the Fire- and Flying-type Legendary Pokémon Ho-Oh will be available in Raid Battles for the duration of this period.
Date + Time
– Friday, Dec. 14, 2018, at 1 p.m. PST (GMT −8) to Monday, Dec. 17, 2018, at 1 p.m. PST (GMT −8)
Features
– Legendary Pokémon Lugia and Ho-Oh have returned to Raid Battles
– You may encounter a Shiny Lugia or Shiny Ho-Oh
– These Legendary Pokémon can be added to your Ultra League battle party
Source: @PokemonGoApp