Young adults typically believe that life gets increasingly satisfying over time. We examined the cultural life script as a source of these beliefs. In Study 1 (N = 1244), tabulation of previously published studies indicated that life script events are perceived as becoming increasingly positive over time between the ages of 10 and 30. Further, a specific series of 16 key life script events during this life stage was identified. These results were replicated in Study 2 (N = 100, Mage = 21.14, 51% female) based on young adults' perceptions concerning life script events in their personal life stories. Further, the perception that life script events in one's personal life story were becoming increasingly positive over time was linked with more steeply inclining subjective life satisfaction trajectories (i.e. recollected past < current < anticipated future life satisfaction). In Study 3 (N = 261, Mage = 18.5, 93.7% female), manipulating life script event information (number and positivity of events over time) within a personal life story had an additive impact on young adults' subjective life satisfaction trajectories. These findings reveal a robust connection between information contained with the cultural life script and the belief that life gets more and more satisfying over time. Copyright © 2016 European Association of Personality Psychology