The historical connection
Huangdi Neijing / 四氣調神大論篇第二
This chapter connects seasons and daily living. The daylight routine here is an editorial application informed by modern sleep guidance.
Read the source and edition detailsOpen the curtains after waking and give your daily rhythm a consistent starting point.
Decide now to open the curtains after waking tomorrow.
People with irregular waking times or mornings spent indoors.
Choose a realistic waking time without cutting the sleep you need.
Open the curtains and, if practical, spend time outdoors in daylight.
Note your waking time and how sleepy you feel in the morning.
Try it after waking on weekdays, then look at how weekends differ.
Notice whether starting the day feels easier and whether sleep timing changes.
Huangdi Neijing / 四氣調神大論篇第二
This chapter connects seasons and daily living. The daylight routine here is an editorial application informed by modern sleep guidance.
Read the source and edition detailsBased on the guide’s discussion of light and daily rhythm. Three minutes is a setup estimate, not a prescribed exposure dose.
厚生労働省 · Sleep Guide for Health Promotion 2023Checked 2026-11-09The routine is an editorial proposal, not a literal translation, diagnosis, or prescription. A cited source does not necessarily test this exact routine.