Wild guess: you started waking up a more consistent time each day (less sleeping in on weekends). This might have been a result of getting more sleep on weekday

Wild guess: you started waking up a more consistent time each day (less sleeping in on weekends). This might have been a result of getting more sleep on weekdays and therefore not feeling like you need to sleep in, or of less late night socializing. As someone who has run the full gamut of sleep schedules over different years of my life, I've found by FAR (orders of magnitude) the most influential factor in how I feel in the morning is the consistency of my wake-up time. The only factor that can sometimes eclipse it is extended periods of sleep deprivation (eg, 1-2 weeks of averaging 4 hours per night). If you want to try this, I highly recommend an alarm app for Android called Talalarmo - https://f-droid.org/app/trikita.talalarmo https://f-droid.org/app/trikita.talalarmo