Howdy MsMary, thanks for asking us your questions about the Samsung Galaxy Ring. The advertised Galaxy Ring tracks daytime naps and non-traditional sleep, though it is primarily optimized for standard nighttime schedules. It lacks a dedicated "Night Shift Mode" or custom shift-work settings, meaning tracking irregular schedules may require manually logging your sleep intervals for accurate health metrics. The Galaxy Ring tracks sleep and naps at all hours of the day. Sleep periods longer than 3 hours are logged as full sleep cycles, while shorter daytime rest is recorded as naps. If the device misses a non-traditional sleep session, you can manually add your sleep records within the Samsung Health App to update your stats. If you have any other questions for us, please feel free to contact Support at your leisure. Thank you for choosing Samsung! - Debra