THE Equinox in the Northern Hemisphere occurs twice a year.
The March equinox kicks off the start of our spring season, and the autumn season in the Southern Hemisphere.
The March 2021 equinox happens on March 20Credit: Getty
Is the spring equinox the first day of spring?
The spring equinox marks the astronomical start of spring and days are longer than nights in the UK.
Daytime will be longer than nighttime as the Sun travels a longer, higher arc across the sky each day, reaching a peak at the start of summer, explains NASA.
The Equinox in the Northern Hemisphere occurs twice a year around March 20 – the spring equinox – and around September 22, the autumn equinox.
They happen between the summer and winter solstices, and mark the point the Sun crosses the equator’s path and becomes positioned exactly above the equator between the Northern and Southern Hemisphere.
During the equinox, day and night will be around the same length, which explains the word’s origin from the Latin equi (meaning ‘equal’) and nox (meaning ‘night’).
The fastest sunsets and sunrises of the year happen at the equinoxes, reports Earth Sky.
The days will feature more sunlightCredit: Getty
Is the spring equinox always on the same day?
Each year the spring equinox, or vernal, always falls toward the end of March between the 19th and 21st of the month.
The spring equinox happens on March 20, 2021, in the Northern HemisphereCredit: Getty
When is the spring equinox 2021?
In 2021, the spring equinox takes place on Saturday, March 20.
This is the day when the length of daylight and darkness become equal.
There will be about 12 hours and ten minutes of daylight on March 20.
Sunlight is refracted by the Earth’s atmosphere, so the Sun appears to rise before its centre at the horizon, giving more daylight than you might expect, explains the Met Office.
Spring will be welcome in the UK after months of rain and coldCredit: Getty