Both 2 AM to 10 AM and 10 PM to 6 AM provide 8 hours of sleep, but only the latter aligns with the body's natural circadian rhythm, which is governed by light exposure and internal biological clocks.Sleeping from 10 PM to 6 AM allows the body to cycle through crucial phases of deep, restorative sleep and REM at their optimal times-especially between 10 PM and 2 AM, when physical repair and hormone regulation (like melatonin, cortisol, and growth hormone) peak. In contrast, sleeping from 2 AM to