Original list

My first attempt, and titles will probably change as I go. Using only first-time viewings to satisfy the criteria, but will probably mix in a few old favorites here and there throughout the month.

I am also attempting a short film version of the challenge.

Total: 32/31

10/6 countries
* USA (Birdemic 2, Dead & Buried, Crowhaven Farm, Tales from the Hood, Island of Lost Souls, The Wicker Man, The Funhouse, The Hunchback of Notre Dame, Phantom of the Paradise, The People Under the Stairs, The Scooby-Doo Project, The Raven)
* Chile (The Wolf House)
* Japan (The Ghost of Yotsuya, Terror of Mechagodzilla, Haunted School)
* Italy (The Beyond, The Black Cat, Blood and Black Lace)
* Spain (The Living Dead at Manchester Morgue, The Skin I Live In)
* UK (The Curse of Frankenstein, Venom, Dracula Has Risen From the Grave, Last Night in Soho)
* South Korea (Train to Busan)
* France (Carnival of Sinners, Raw)
* Czechoslovakia (The Cremator)
* Canada (Blood Quantum)

11/8 decades
* 1920s (The Hunchback of Notre Dame)
* 1930s (Island of Lost Souls, The Raven)
* 1940s (Carnival of Sinners)
* 1950s (The Ghost of Yotsuya, The Curse of Frankenstein)
* 1960s (The Cremator, Dracula Has Risen From the Grave, Blood and Black Lace)
* 1970s (Terror of Mechagodzilla, The Living Dead at Manchester Morgue, Crowhaven Farm, Phantom of the Paradise)
* 1980s (The Beyond, Dead & Buried, Venom, The Black Cat, The Funhouse)
* 1990s (Tales from the Hood, The People Under the Stairs, Haunted School, The Scooby-Doo Project)
* 2000s (The Wicker Man)
* 2010s (Birdemic 2, The Wolf House, Train to Busan, Blood Quantum, Raw, The Skin I Live In)
* 2020s (Last Night in Soho)

2/2 folk horror
* Crowhaven Farm
* The Wicker Man

5/4 films from 1981
* The Beyond
* Dead & Buried
* Venom
* The Black Cat
* The Funhouse
(almost but not quite: Blood Quantum, which takes place in 1981)

2 films from your birth year (1974)
* The Living Dead at Manchester Morgue
* Phantom of the Paradise

2 haunted house films
* The Beyond
* Haunted School

The worst Part 2 that you haven't seen and can access
* Birdemic 2

1 film set in the woods
* The Wicker Man

1/1 Kaiju or Kong film (not the new K v. G)
* Terror of Mechagodzilla

2 Hammer films
* The Curse of Frankenstein
* Dracula Has Risen From the Grave

3 films with a non-Asian person of color as director or lead.
* Tales from the Hood
* Blood Quantum
* The People Under the Stairs

3/3 Asian horror films
* The Ghost of Yotsuya
* Terror of Mechagodzilla
* Train to Busan

And 1 Tobe Hooper film
* The Funhouse
(almost but not quite: Venom, from which Hooper departed due to "creative differences")

Extra Credit:
* J.D.'s Revenge
* The Skull
* The Scooby-Doo Project