The Solstices' are the longest day [June 21 or 22(in northern hemisphere)] and Shortest day in [December 21 or 22(northern hemisphere)]. The Equinoxes happen every 6 months in September 21st and March 21st, they're also another word for Daylight Savings Time.
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The solstices occur around June 21st (summer solstice) and December 21st (winter solstice) each year. The equinoxes occur around March 21st (spring equinox) and September 23rd (autumn equinox) each year.
Solstices occur when the sun reaches the highest and lowest points in the sky. The summer solstice is on the 21st June and the winter solstice is on the 21st December.
Equinoxes are different, they occur around 20th March and 22nd September, when the Earth is neither pointing towards the sun or away from it. They are roughly between the solstices. At an equinox, day and night will be roughly the same duration.
The axis of rotation round which the earth spins (a line passing through the middle of the Earth and the North and South poles) is not upright in relation to the plane described by the Earth as it orbits the Sun. The axis is tilted some 23.5 degrees of the vertical.
This means at one part of the orbit the north pole is pointing towards the Sun and 180 degrees round the orbit, it is pointing away form the Sun.
For the northern hemisphere, winter solstice is when the Sun is furthest to the South, summer solstice is when the Sun is furtherst to the North. For the Southern Hemisphere, it is the other way round.
The solstices and equinoxes are points on the map of the stars. Regardless of
where you live, the sun reaches and passes those points at the same times ...
the equinoxes on March 21 and near September 22, and the solstices near June 21
and December 22.
The thing that does depend on your hemisphere is the seasons that begin for you
on each of these dates.
March Equinox:
Northern . . . Spring begins
Southern . . . Fall begins
June Solstice:
Northern . . . Summer
Southern . . . Winter
September Equinox:
Northern . . . Fall
Southern . . . Spring
December Solstice:
Northern . . . Winter
Southern . . . Summer
During the Earth's movement around the Sun, the axis tilt. Four times a year this causes the solstice and equinoxes. These are also called our seasons. Spring, Summer, Fall, and Winter.
The two seasons that begin with solstices rather than equinoxes are summer and winter.
The names of the two equinoxes are the vernal (spring) equinox and the autumnal (fall) equinox.
The dates of the solstices and equinoxes vary because Earth's orbit around the sun is not a perfect circle, but an ellipse, causing the speed at which Earth moves around the sun to vary. Additionally, gravitational pull from other celestial bodies, such as the moon and planets, can also influence Earth's orbit and the exact timing of these astronomical events.
The two equinoxes are the vernal (spring) equinox, which occurs around March 20th, and the autumnal (fall) equinox, which occurs around September 22nd. During these times, the length of day and night are nearly equal all over the world.
The summer solstice occurs around June 21st, marking the longest day of the year in the Northern Hemisphere and the shortest day in the Southern Hemisphere. The winter solstice occurs around December 21st, marking the shortest day in the Northern Hemisphere and the longest day in the Southern Hemisphere. The spring equinox occurs around March 21st and the autumnal equinox around September 23rd, when day and night are almost equal in length worldwide.