Trainers, for Alolan Marowak Raid Day, up to 5 free Raid Passes will be available from Gyms. Also, as a special bonus, a free box containing 3 Remote Raid Passes will be available in the shop from Friday, October 30, at 1 p.m. to Sunday, November 1, at 1 p.m. Pacific Time.
Alolan Marowak Raid Day - Saturday, October 31, at 11:00 AM - 5:00 PM Local Time
Remote Raid Pass Box - Saturday, October 31 at 7:00 AM AEDT - Monday, November 2 at 7:00am AEDT
Tip: Have Galarian Yamask (from 'A Spooky Message Unmasked' Reserach) as your buddy during the Raid event, as it requires completion of 10 Raids to evolve.
Good if you can find people to play with, but it's a ghost town in inner city Sydney.