The date was June 7th, 1993. Every year this happened. They took an IQ test, and those with the lowest IQ, were taken away and killed. This was to help population control, but they failed to see the problem they were creating.
With fewer lower IQ level people, there was no one to work in the jobs that weren't desirable for those with higher IQ's. There was higher competition for the other jobs, and not enough people to do the undesirable jobs.
With so much competition for the desirable careers, and no one to do the undesirable careers, society began to crumble. Suicide rates skyrocketed. The citizens working the low IQ careers were unhappy. Citizens were homeless. There weren't enough jobs to go around. They needed different people to do different careers. They needed the low IQ people back. But it was too late.