If everyone found out for sure that the world would end in five years, what would happen?
My guess is that it would take time before anything big happened. Finding out about the end of the world, that’s the kind of a thing that you need to digest for a while. For the first couple of days, people might go “huh”, and then carry on with their old routines while thinking about it.
A few months later, maybe there still wouldn’t be all that much change. Sure, people would adjust their life plans, start thinking more near-term, some would decide not to go to college after all. But a lot of people already don’t plan much beyond a couple of years; five years is a long time, and you’ll still need to pay your bills until the Apocalypse hits. So many people might just carry on with their jobs as normal; if they were already doing college, well, you need to pass the time until the end of the world somehow. Might as well keep studying.
Of course, some people would have bigger reactions, right from day one. Quit their unsatisfying job, that kind of thing. People with a lot of savings might choose this moment to start living off them. And as the end of the world got closer and closer, people might get an increasingly relaxed attitude to work; though there might also be a feeling of, we’re all in this together, let’s make our existing institutions work until the end. I could imagine doctors and nurses in a hospital, who had decided that they want to make sure the hospital runs for as long as it can, and to make sure that nobody has to die before they really have to.
But I could also imagine, say, the waiter at some restaurant carrying on, serving customers even on the night of the apocalypse. (Be sure to make a reservation, we expect to have no free tables that evening.) Maybe out of principles, maybe out of professional pride, but maybe just out of habit.
I’m guessing there would be gradual changes to society, with occasional tipping points when a lot of people decided to stop whatever they had been doing and that created a chain reaction of others doing so as well. But it seems really hard to guess for how long things would remain mostly normal.