Spring Equinox 2021: what is it and when is it taking place this year | The exact time of the farewell to winter

One thing is the conventionally established date and another, what determines the astronomical calendar. Students took to the streets yesterday to celebrate the arrival of spring, but in this 2021 this season It begins this Wednesday 22 at 4:20 p.m., time at which it will take place on the equinox.

Spring has a very changeable climate, with sunny days but also abundant rainfall. Temperatures also undergo significant thermal fluctuations between day and night.

Astronomical calendar

According to the astronomical calendar, the spring season begins in the Spring Equinox; that is, when the Earth is at the center of the Sun’s orbit, which occurs between September 21 and 23 in the southern hemisphere and ends with the summer solstice – around the 21 or December 22 -. The exact date varies from year to year.

At this moment the two hemispheres of the Earth are the same distance from the Sun. This is why day and night last the same.

Equinoxes and solstices

The equinoxes and the solstices are events that mark the beginning of the astronomical seasons, whose dates do not coincide year after year.

Only after a cycle of 400 years the seasons they start over on about the same days.