ShiftDawn Finds the Hour That Breaks Your Shift

Field notes

The tool asks users to select a work pattern, including fixed nights, rotating shifts, and early starts, then positions a likely core body-temperature minimum against the roster. Its guidance distinguishes light before that point from light after it, and explicitly considers whether the low-alertness period overlaps the drive home. The site also offers schedule-specific guides for nurses, truck drivers, 4-on 4-off rotations, caffeine timing, and switching back to day work.