The perfect harmony in the form of wonderful health is the natural flow of being in fair agreement with the universal laws.
Yellow Emperor Classic
No culture has deepened so much around vital energy and the cultivation of longevity as the ancient Chinese culture. Owners of a traditional medicine that still remains in force after thousands of years of practice, Chinese culture, particularly taking from the Daoist philosophy, has developed a body of knowledge about the natural rhythms and habits of the organism that is difficult to overcome. Before modern science devised chronobiology, the Chinese had already developed the art of cultivating health according to the patterns that nature or yang shèng mark . In one of the central texts of Chinese medicine, the "Bible of Acupuncture, " the famous Inner Classic of the Yellow Emperor (Huangdi neijing) explains that the human being must adapt to the different seasons since each of them has different qualities; particularly, the less sun there is in nature, the less vital energy ( qi ) man has access to.
Hence we can take the protocol to adjust the schedules in which we sleep according to the season. The scheme outlined in this book is as follows:
-In winter you should go to bed early and get up late. This is especially important to take care of the kidney.
-In spring one should go to bed late and get up early. In this season the special care is about the energy of the liver.
-In summer one should go to bed late and get up early. Here you have to take care of the heart.
-In autumn you should go to bed early and get up early. Here lung energy is taken care of.
As you can see, the disposition of sleep depends on the amount of daylight energy (yang). Also, Chinese medicine has a marked tendency towards health prevention rather than the correction of a disease. That is why, for example, it is sought during the year to store energy so as not to get sick in winter. In autumn, the respiratory system is taken care of especially, since it usually gets sick in winter (the forecast is essential).
The seasons in the Chinese calendar are not exactly the same as in the western calendar. It is also important to take into account the hours of sun according to latitude: a person who lives in the equator will not really have to apply with the same rigor is practical. You can visit the page of the Mexican Daoist Association to learn more about it.