Little Nightmares Bullies - Tumblr Posts
Not to mention the pool of shoes in the maw is suppost to allude to the many shoes of dead people of the holocaust. If you look through everything in LN1-2, a lot of stuff is somewhat similer to WW2
Theres a whole video on youtube about it
Little Nightmares 2: THE DARKEST THEORY YET... by The Indie Gamer
Guys I think I figured out when Little Nightmares takes place!
If we look at what clothes the characters wear they all fall within a late 1940s-ish timeframe.

Bullies wear late 1940s school clothes.

The thin man wears clothes resembling a radio broadcaster from the 40s.

The Viewers clothing is hard to track down but does resemble clothing from the late 40s.


The televisions themselves resemble very late 1940s televisions.

six's lighter looks like a 1940s lighter.

Psych wards like the one in the hospital were used in the 40s as well.
Sure there are a couple of odd ones out like The Teacher wearing a 1910s teacher outfit and the hunter wearing a gatsby cap but none go beyond the late 1940s.
My personal headcanon from all this is that the little nightmares universe takes place around 1948-1949