Alolan Marowak Raid Day
Date + Time
- Saturday, October 26, 2019, from 11 a.m. to 2 p.m. in your local time zone.
- Alolan Marowak caught in raids during this period will know the special move Shadow Bone.
UPDATE: Niantic has confirmed that this announcement was a mistake on their part; therefore, Alolan Marowak Day is not happening.
Source: Official Pokémon GO news post