Season three featured a fourth of July celebration and was released on the same day as well.
The latest trailer saw Hopper digging out a railroad in thick snow, prompting viewers to point out the show could be set over Christmas and New Year.
Reddit user hushpolocaps69 speculated: “Seeing how season two took place around Halloween, season two was released on Halloween. Then with Season three, it took place around 4th of July and then guess what, it released on Independence Day.
“Seeing how we know very little of season four, such as when it takes place, I wonder when it’ll come out. Could it possibly be Thanksgiving?