What you need to know:
When does winter start? Well, the cold is already breathing down our necks.
Now tiger blankets and double socks should be the norm in these months. When does the winter solstice begin? With the news that this Thursday, December 21, we will experience the beginning of this cold season of the year.
This means that we will have the shortest day and the longest night of the entire year and winter will welcome us with the second winter storm of the season.
When does the winter solstice begin?
According to the National Institute of Astrophysics, Optics and Electronics (INAOE), the winter solstice of this 2023 will occur this Thursday, December 21 at 9:27 p.m. Central Mexico time.
The winter solstice occurs in December and in the northern hemisphere the date marks the 24-hour period with the fewest hours of daylight of the year. That is why it is known as the shortest day of the year or the longest night of the year .
After the shortest day, the days begin to become longer and the nights shorter. At the spring and autumn equinoxes, the hours of day and night are approximately the same length and each lasts about 12 hours.
How many solstices and equinoxes are there per year?
With the beginning and end of the seasons, always come the solstices and equinoxes; two solstices, winter and summer, and two equinoxes, spring and autumn.
The two phenomena are determined by the position of our planet with respect to the sun..
If a cross were drawn from the center of our star, taking within the elliptical orbit of our planet, the four points would mark the winter solstice (December 21), the spring equinox (March 21), the summer solstice (The 21st of June), and the autumn equinox (on September 22).
Meanwhile, when the points of the orbit coincide with the ends of the minor axis they are called equinoxes. As with the solstices, there are also two, spring and autumn. The equinoxes are the days of the year when day and night are the same length..
On the other hand, from the spring equinox to the summer solstice, The length of the night is becoming shorter, and there are more and more hours of daylight, so the days are gradually lengthening.
On the contrary, starting with the summer solstice, the hours of light are decreasing, until at the autumn equinox the hours of light and darkness are equal, and at the winter solstice the maximum number of hours of darkness is reached.
Finally, it should be noted that the seasons of the year are reversed in the two hemispheres and that when it is winter in one, the other is summer; or when it’s spring here, on the other side it’s autumn, so the solstices and equinoxes are different in the northern and southern hemispheres.