When Does the Film "Joker: Folie à Deux" (2024) Take Place?
"Joker: Folie à Deux" is a crime film-musical written by Scott Silver with Todd Phillips [loosely adapting "The Batman Adventures: Mad Love" (1993) by Paul Dini with Bruce Timm as well as "Joker/Harley: Criminal Sanity" #1-#5 (2019-2020) by Kami Garcia] that released October 2nd, 2024. So when is "Folie à Deux" set?
It takes place on an alternate timeline of the fictional DC Films Universe in the year:
We know this because TV news reporter "Paddy" Meyers says about Arthur Fleck/The Joker, "2 years ago, the name Arthur Fleck hit Gotham like a hurricane", referring to the events of "Joker" (2019), which takes place in 1981 AD.

1983 AD
We know this because TV news reporter "Paddy" Meyers says about Arthur Fleck/The Joker, "2 years ago, the name Arthur Fleck hit Gotham like a hurricane", referring to the events of "Joker" (2019), which takes place in 1981 AD.
1981 + 2 = 1983.
More specifically, about three-quarters through the story a radio declares, "Good evening, it's 48 degrees at 6 o'clock on this Wednesday, November 8th. I'm Stan L. Brooks and here's what's happening." So it is November of 1983 AD.

