Spring Equinox 2022

John Williams

20 Mar 2022

20 March 2022 marks the Spring Equinox, a yearly astronomical occurrence that signifies the start of the new season.

The northern and southern hemispheres are equally illuminated. The length of day and night is pretty much exactly the same for the entire world. This phenomenon is because the Earth’s axis is perpendicular to the sun’s rays.

Solar PV Yield

For the solar industry in the Northern Hemisphere, the Spring Equinox marks the beginning of the season of increased yield. The figure shows a month-by-month cumulative production for a typical solar PV installation.

The amount of irradiation is key. Ambient temperature is not a major factor. Therefore, solar PV productivity is not affected by the lag between the length of day and the average temperatures in mid and high latitude locations where the warmest part of the summer lags the Summer Solstice. This lag is due to the time required for ground and water to heat up. That is why August is typically warmer than June even though the hours of daylight are considerably less.

Cultural Celebration

The Spring Equinox has long been celebrated in the northern hemisphere as a time of rebirth and has cultural significance in various festivals such as Easter and Passover.

Stonehenge

Witches, wizards and druids far and wide are familiar with the significance of the March equinox. Every year, they gather to watch the sun rise at Stonehenge, the 5,000-year-old monument in Wiltshire.

Find a Fairy

According to legend, fairies exist all over the world, but they are easier to find during the equinox because of their passion for liminal, in-between spaces, like the moment where night meets day or where land meets a shoreline.

As with most folklore, it may only be partly true. But folklore or not, it sounds like fun to try. let us know if you get lucky and ally yourself with a Fairy.