This year the spring equinox will arrive in Mexico at dawn. It will take place next Saturday, March 20, at 03:30, said Daniel Flores Gutiérrez, a researcher at the Institute of Astronomy (IA) of the National Autonomous University of Mexico (UNAM).
He explained that during this event the Sun crosses the celestial equator from south to north of the Earth, the day and night last the same and the season of warm days begins.
The Earth will continue its journey around the Sun in the celestial vault during 2021 and will reach its position in the extreme north in what is known as the summer solstice (June 20, at 9:32 p.m.); again it will arrive at the celestial equator, beginning the autumn equinox (September 22, at 1:21 pm); and finally in the south of the Earth it will reach the extreme on December 21 at 09:59 hours, detailed the also editor of the Yearbook of the National Astronomical Observatory.
Flores Gutiérrez explained that in addition to marking the passage of the Sun through the Earth’s equator, the equinox establishes the beginning of warm days, especially to the north of the Earth’s sphere; That is why there were great celebrations anticipating the arrival of the new temperatures.
He specified that the arrival of the hot season should not be confused with the fact that the planet is closer or further away in its orbit around this star. Curiously, he said, the closest point to the Sun is in January, when we are still in winter. The reason for the temperature on Earth is due to the inclination of its axis of rotation, he said.
The IA expert recalled that it has become customary to visit places such as Teotihuacan or Chichén Itzá where games of light and shadow are generated. “As we go, we make a remembrance of ancient knowledge that was very important to agricultural society.”
Héctor Daniel Hernández Flores, from the Anthropological Research Institute, added that Mesoamerican peoples related the equinox to the beginning of the agricultural cycle. In colonial times, rituals were reconceptualized and re-signified.
“We can see it in indigenous communities with the celebration of certain patron saint festivals that are linked to specific dates of the Greco-Roman calendar, but that correspond to the recognition of the so-called Mesoamerican worldview practices. An example is the celebration of San Isidro Labrador, on May 15, which marks the beginning of the agricultural cycle, ”said the researcher.