Eternal winter (Post-apocalypse)

The world suddenly and unexpectedly became covered in snow and cold began to set in everywhere. Snowstorms occur every few days, and all the water is frozen now.

From 7pm to 10am, sometimes from 7pm to 12am. It is noticeable by the long darkness

This bunker belongs to an unknown person who left. The bunker has many different rooms: a kind of warehouse, a kitchen, bedrooms and even a bathroom, a greenhouse in which vegetables grow. In one of the rooms there is a huge stove, but it is not entirely clear why it works. Heat flows through the pipes in the furnace and warms the entire bunker. Somewhere there is an exit to the outside with a thick door to keep out the cold.

If you open the bunker door, you can see a ladder. If you climb up it, there will be another thick door. If you open this door, there will now be an exit into some building resembling a garage, and then the final exit out. There is also a car in the garage for winter travel, the garage is big enough to fit two such cars.

It is impossible to say for sure, but apparently there is an unknown station outside that creates electricity and transmits it to the bunker.

Constant snowstorm, constant low temperatures (at best no more than -10, but most often much lower), Long nights, trouble finding groceries outside