Why Your Date Filters Might Be Lying To You
Blog post from Sigma
Accurate date and time management is essential for business intelligence, as time zone discrepancies and inconsistent date formats can lead to incorrect data interpretation and flawed decision-making. The article emphasizes the importance of using the ISO 8601 standard for date formatting and storing timestamps in UTC to prevent data misalignment. It discusses challenges such as time zone handling, the need for effective date filtering, and the significance of comparing performance over different periods to provide context for business metrics. Techniques like moving averages help smooth out data volatility, while advanced date functions enable deeper insights by allowing precise temporal analysis. Building data trust involves establishing clear standards and rigorous testing to ensure stakeholders have confidence in the data they use for decision-making, transforming temporal data into a strategic asset.