Everyone "knows" the reasons why the seasons change constantly. Indeed, since school we know that the planet Earth revolves around the Sun and the reason for the change of seasons lies in the tilt of the earth's axis relative to its planetary orbit. Both the tilt of the axis of rotation and the distance from the Earth to the Sun do not remain constant, which means that they will gradually affect climate change and the pattern of the seasons. This obvious fact, however, does not give an equally obvious indication of the cause of this phenomenon.
If we talk about traditional academic science, then it builds only unsubstantiated theories regarding this phenomenon, which do not give clear answers to the questions "why". Despite this, separate scattered records have survived to this day, explaining why the seasons change and when she came to this world. It came, because when life appeared on Earth or after people appeared on our planet in all climatic zones, the weather was the same.three hundred something days (assuming even the length of the year was more stable during that period).
And what led to global climate change hit the Earth much later. Here, in fairness, it is worth noting that modern archeology was able to prove that the Earth did not always have a change of seasons. The sources that have come down to our time do not directly indicate what was the cause of the cataclysm, but it is clear that it was something catastrophic and it was able to shift the earth's axis. Whether it was the impact of a large celestial body, or whether Mother Earth herself started up, it is impossible to say at the moment. Yet, today there is written evidence of the changes that have taken place (see diagrams below).
According to one data, the Chinese civilization existed for 3 thousand years, while the Chinese themselves prefer the number 5000. Be that as it may, there are two sets of trigrams that are associated with the progenitor of the entire Han nation - Huang Di (Yellow Emperor). The first set of trigrams is represented by a fully balanced scheme and is translated into Russian as "Celestial". The second set has a certain shift in its structure and is called "After Heaven". In all literature, in one way or another connected with the legendary "Book of Changes", the change of seasons in its current version is associated with the "Post-heavenly" order of trigrams. Although it says that before everything was in order, since the whole world was arranged according to the "Celestial" set of trigrams.
No less epicthe work "Bhagavad Gita", which is also a kind of processing of folklore about Vishnu and the entire Hindu pantheon, reports that before the opening of the underground gates and the hordes of "dark forces" got out of the dungeon and gave birth to blacks (it's hard to say in what sense) people, all people on earth lived and did not know what the change of seasons is. Of course, it is necessary to treat such folklore records with a certain degree of skepticism. But, most likely, the sources mentioned above are talking about the same thing. Everything flows, everything changes, and for the same reason, our understanding of nature, where we live, must also be revised. Otherwise, without knowledge of our past, we are unlikely to be able to look into our future.