People often have a tendency to believe that they will be happy when certain desirable events or possessions occur in their lives. This belief, known as the arrival fallacy or the happily-ever-after fallacy, leads to mispredictions of happiness. Researchers have found that the actual experience of achieving these goals or obtaining these possessions does not match the anticipated intensity or duration of happiness. This phenomenon, known as affective forecasting errors, results in disappointment when reality falls short of expectations.