Exploring the concept of time in databases, specifically how to model and represent it. It delves into various time-related concepts, including primary and documentary time, different timelines, and the impact of time tracking scope on data integrity. The author also compares two modeling techniques, Anchor and Data Vault, which approach time management differently. The article concludes with a discussion of imprecision and uncertainty in time tracking, highlighting the complexities and challenges involved in handling these nuances within database systems.