The American Time Use Survey (ATUS) is an ongoing annual time diary study initiated in 2003 that tracks how Americans spend their daily lives. Created and funded by the U.S. Bureau of Labor Statistics (BLS) with field work conducted by the U.S. Census Bureau, this survey provides nationally representative estimates of how, where, and with whom Americans spend their time. The dataset contains detailed information about respondents' activities during the previous day, including activity codes, duration, start/stop times, location data, and companionship details. It also includes extensive demographic characteristics of respondents and their household members. ATUS serves multiple purposes: measuring productivity, studying time allocation between work/family/leisure, analyzing gender differences in household labor, and evaluating policy impacts on time use. Researchers have employed it for diverse studies ranging from parent-child interaction patterns to the effects of shift work on daily life. Key features include its time diary methodology providing rich contextual data, approximately 26,400 annual household interviews, and the ability to link with Current Population Survey (CPS) data for deeper analysis. The survey offers unique insights into unpaid labor, childcare, eldercare, and other non-market activities that are often overlooked in economic statistics.