Changing seasons, work schedule changes, welcoming a child, and other major life events can disrupt our internal biological timekeeping. This timekeeping controls sleep, metabolism, mood, fatigue, and even immune function. The Social Rhythms app uses data shared anonymously from wearables through Apple Health with research developed at the University of Michigan to customize reports on how life events have impacted your daily (circadian) clock or if your circadian timekeeping is disrupted.