Working late into the night and getting only a few hours of sleep can disrupt your body's natural rhythm, leading to waking up earlier than expected. This is often due to circadian rhythm misalignment, where your internal body clock struggles to adjust to unusual sleeping hours. Personally, I experienced the same pattern after finishing work at midnight and only falling asleep by 3 a.m., waking up around 8 a.m. It's frustrating because despite a short sleep duration, you feel alert earlier than usual. One reason is that your body still cues morning light as a signal to wake up, which can override your tiredness. To cope, I found it helpful to create a consistent wind-down routine before bed, such as avoiding screens an hour before sleeping and using blackout curtains to block early morning light. Also, napping strategically during the day when possible can help alleviate sleep debt. Understanding that abrupt schedule changes can temporarily mess with your sleep helps in managing expectations and improving habits. Over time, your body can adapt better with deliberate routines, helping you get more restorative sleep even with late work shifts.