The timeline for the CBS Ghosts series spans more than 1000 years, far predating the Woodstone B&B that Rose McIver’s Sam and Utkarsh Ambudkar’s Jay have had up and running for the last few seasons. The harrowing tales of Woodstone Mansion date back to when Vikings roamed indigenous land and span until the modern day. The British sitcom of the same name inspired the American Ghosts series. While the British and American share many elements, CBS refreshed Ghosts for an American audience. Still, the series covers various periods and ghost backstories with their characterization.

https://screenrant.com/ghosts-woodstone-timeline-explained/