The Chronosystem is a concept from the ecological systems theory developed by Urie Bronfenbrenner. It refers to the dimension of time in a person's environment, highlighting how life events and transitions can influence development. This includes changes in family structure, socio-economic status, or significant historical events that impact individuals over time. In the Chronosystem, both the timing and duration of these events are important. For example, experiencing a major life change, such as a divorce or moving to a new city, can have lasting effects on a person's development. Understanding the Chronosystem helps researchers and practitioners consider how time-related factors shape individual experiences and growth.