This is an unlisted work-in-progress document for discussion while speculating about the timeline.
Do not use as a public reference until published.
All dates below presuming Season 1 takes place in 2020; adjust accordingly.
“We sort of intentionally kept a lot of ambiguity to the time and place,” Erickson told TheWrap. “We obviously shot mostly in New York and New Jersey, so there's sort of a vague New England, east coast-y feel to to the city, but we didn't really want to know exactly where it was or tie it to a specific locale.”
As for when “Severance” takes place, it's not a far-off future. “It is around now, it's like vaguely now-ish,” he said. “We're not going for something where this is 10 years in the future where severance has been invented and already exists. It's sort of an alternate, vaguely now-ish timeline.”
Source: Dan Erickson quote, February 4, 2022 — ‘Severance’ Creator Knows Exactly How the Elevator Technology Works